1. Bordoloi, S., Fitzsimmons, J. A., & Fitzsimmons, M. J. (2019). Service Management: Operations, Strategy, Information Technology. New York: McGraw-Hill Education.
2. Ceci, L. (2021, October). Number of Apple App Store and Google Play mobile app downloads worldwide from 3rd quarter 2016 to 3rd quarter 2021. Retrieved from Statista: https://www.statista.com/statistics/695094/quarterly-number-of-mobile-app-downloads-store/
3. Damar, A. M. (2020, November 12). Pengguna Internet Baru di Asia Tenggara Naik 4 Kali Lipat Akibat Pandemi Covid-19. Retrieved from Liputan6: https://www.liputan6.com/tekno/read/4406079/pengguna-internet-baru-di-asia-tenggara-naik-4-kali-lipat-akibat-pandemi-covid-19
4. Firmansyah, D. A. (2018). Perilaku Konsumen (Sikap dan Pemasaran). Yogyakarta: PENERBIT DEEPUBLISH.
5. Grisby, M. (2018). Marketing Analytics: A practical guide to improving consumer insights using data techniques (2nd edition). London; New York: Kogan Page.
6. Hawkins, D., & Mothersbaugh, D. (2016). Consumer Behavior: Building Market Strategy (13th ed.). New York: McGraw-Hill Companies, Inc.
7. Isson, P. J. (2018). Unstructured Data Analytics: How to Improve Customer Acquisition, Customer Retention, and Fraud Detection and Prevention. New Jersey: John Wiley & Sons, Inc.
8. Kim, K.-H., Kim, K.-J., Lee, D.-H., & Kim, M.-G. (2019). Identification of critical quality dimensions for continuance intention in mHealth services: Case study of onecare service. International Journal of Information Management.
9. Kreutzer, R. T., & Sirrenberg, M. (2020). Understanding Artificial Intelligence Fundamentals, Use Cases and Methods for a Corporate AI Journey. Germany: Springer.
10. Kulkarni, A., & Shivananda, A. (2019). Natural Language Processing Recipes: Unlocking Text Data with Machine Learning and Deep Learning using Python. New York: Springer Science, Business Media.
11. Masrury, R. A., Fannisa, & Alamsyah, A. (2019). Analyzing Tourism Mobile Applications Perceived Quality using Sentiment Analysis and Topic Modeling. 2019 7th International Conference on Information and Communication Technology (ICoICT).
12. Mishra, U. (2021, May 16). Binary and Multiclass Classification in Machine Learning. Retrieved from Analytics Steps: https://www.analyticssteps.com/blogs/binary-and-multiclass-classification-machine-learning
13. Sarkar, D. (2016). Text Analytics with Python: A Practical Real-World Approach to Gaining Actionable Insights from your Data. India: Apress.
14. Saura, J. R., & Thomas, S. B.-M. (2020). Gaining a deeper understanding of nutrition using social networks and user-generated content. Internet Interventions.
15. Setiawan, D. F., Tristiyanto, T., & Hijriani, A. (2020). APLIKASI WEB SCRAPING DESKRIPSI PRODUK. Jurnal Teknoinfo.
16. Sharma, R. (2020, September). Data Mining Vs. Data Analytics: Difference between Data Mining & Data Analytics. Retrieved from UpGrad: https://www.upgrad.com/blog/data-mining-vs-data-analytics/
17. Venkatesan, R., & Er, M. J. (2014). Multi-Label Classification Method Based on Extreme Learning Machines. 2014 13th International Conference on Control Automation Robotics & Vision (ICARCV). Singapore: IEEE.
18. Wirtz, J. &. (2016). Service Marketing: People, Technology, Strategy. New Jersey: World Scientific.
19. Zeithaml, V. B. (2017). Service Marketing: Integrating Customer Focus Across The Firm. Singapore: McGraw-Hill Education.