1. Alvin Parker (2023), 15 Disadvantages of Online Learning Everyone Should Know, Retrieved from https://www.prosperityforamerica.org/disadvantages-of-online-learning, updated February 26, 2023
2. Anna Rutkowska (2022), Błazej Cieślik, Agata Tomaszczyk and Joanna Szczepańska-Gieracha, Mental Health Conditions Among E-Learning Students During the COVID-19 Pandemic- Sec. Public Mental Health, Frontier Public Health, 17 May 2022, Volume 10, 2022.
3. Brooke Hollister (2022), Praveen Nair, Sloan Hill-Lindsay, and Leanne Chukoskie, Engagement in Online Learning: Student Attitudes and Behaviour During COVID-19, Frontier Education, 09 May 2022, Sec. Digital Learning Innovations, Volume 7 -
4. Cindy Miller (2018), Director of Columbia College Global Civilian Region 2 and Director of Columbia College Kansas City, Columbia College, Mission "Impossible": Building Relationships with Online Students, retrieved from https://evolllution.com/revenue-streams/distance_online_learning/mission-impossible-building-relationships-with-online-student, updated 2018/01/25.
5. Data protection and privacy implications of online and remote learning, Mark Orchison, Managing Director, 9ine and Katie Rigg, CIS Head of Safeguarding & Student Well-being, retrieved from https://www.cois.org/about-cis/news/post/~board/perspectives-blog/post/data-protection-and-privacy-implications-of-online-and-remote-learning, updated,27 March 2020
6. David Morris (2010), University of East London, E-confidence, or incompetence: Are teachers ready to teach in the 21st century? World Journal on Educational Technology Current Issues 2(2):142 – 145, August 2010.
7. Felicitas Biwer (2021), Wisnu Wiradhany2, Mirjam oude Egbrink, Harm Hospers, Stella Wasenitz, Walter Jansen, and Anique de Bruin, Changes and Adaptations: How University Students Self-Regulate Their Online Learning During the COVID-19 Pandemic- Sec. Higher Education, Frontier Education., 23 April 2021, Volume 12 – 2021.
8. Retrieved from https://myviewboard.com/blog/education/4-challenges-of-hybrid-learning updated September 29, 2020.
9. Hybrid And Blended Learning (2021): Poor Planning and Rising Opportunities in Uncertain Times, Retrieved from https://www.edweek.org/technology/hybrid-and-blended-learning-poor-planning-and-rising-opportunities-in-uncertain-times, updated September 15, 2021
10. Jachintha Joyce (2023), Are we ready for hybrid tertiary education in Malaysia? Business Today Editorial -July 13, 2023.
11. Jenna Gillett-Swan (2017), Queensland University of Technology, The Challenges of Online Learning Supporting and Engaging the Isolated Learner, Journal of Learning Design, Special Issue: Business Management, Vol. 10 No. 1., 2017.
12. Jessie S. Barrot (2021), corresponding author Ian I. Llenares, and Leo S. del Rosario, Students’ online learning challenges during the pandemic and how they cope with them: The case of the Philippines, Education Information Technologies, 2021; 26(6), 2021.
13. Jitendra Singh, Keely Steele, and Lovely Singh (2021), Combining the Best of Online and Face-to-Face Learning: Hybrid and Blended Learning Approach for COVID-19, Post Vaccine, & Post-Pandemic World, The Journal of Educational Technology Systems (ETS), Volume 50, Issue 2.
14. Learning Environments (2021): Implications for Post-Pandemic Teaching, Vol. 23, No. 3 International Journal of Multicultural Education.
15. Lee Bih Ni, Hybrid and Virtual Learning (2023).: Bridging the Educational and Digital Device, Malaysian Journal of Social, Sciences and Humanities (MJSSH), vol. 8(1), e002035,
16. MoHE to introduce hybrid, flexible learning system at universities (2023): Khaled, Nor Ain Mohamed Radhi, New Straits Times, June 4.
17. Momna Azmat and Ayesha Ahmad (2022)., Lack of Social Interaction in Online Classes During COVID-19, Journal of Materials and Environmental Science, ISSN: 2028-2508, e-ISSN: 2737-890X, CODEN: JMESCN, Volume 13, Issue 02, Page 185-196.
18. Nina Bergdahl (2022), Engagement and Disengagement in Online Learning, Computers & Education, Volume 188, 10456.
19. Olivia L. Holden, Meghan E. Norris and Valerie A. Kuhlmeier (2021), Academic Integrity in Online Assessment: A Research Review, Frontier Education., 14 July 2021, Sec. Higher Education, Volume 6.
20. Sabine Fabriz, Julia Mendzheritskaya and Sebastian Stehle (2021), Impact of Synchronous and Asynchronous Settings of Online Teaching and Learning in Higher Education on Students’ Learning Experience During COVID-9-Sec. Educational Psychology, Frontier Psychology, 11 October 2021, Volume 12.
21. Sanjana Kumari, Hitender Gautam, Neha Nityadarshini, Bimal Kumar Das, and Rama Chaudhry (2021), Online classes versus traditional classes? Comparison during COVID-19, Journal of Education Health Promotion, Volume 10: 457.
22. Susan G. Porter, Kai Greene, M. C. Kate Esposito (2021), Access and Inclusion of Students with Disabilities in Virtual, Sec. Educational Psychology, Volume 12 –, Frontier Psychology.
23. T. Zulaikha Mohd Basar, Azlin Norhaini Mansor, Khairul Azhar Jamaludin, Bity Salwana Aliahe (2021), Effectiveness and Challenges of Online Learning for Secondary School Students – A Case Study, Faculty of Education, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia.