1. Bricken, M., & Byrne, C. M. (1993). Summer students in virtual reality: a pilot study on educational applications of virtual reality technology. Virtual reality applications and explorations, 199-217.
2. Driscoll Jr, E., Morrow, H., Steinhauer, A. J., & Lomax, W. C. (2002). Method and apparatus for a panoramic camera to capture a 360-degree image. U.S. Patent No. 6,459,451. Washington, DC: U.S. Patent and Trademark Office.
3. Frederick P. B, J. (1999). What’s real about virtual reality? 16-26.
4. Gershgorn, D. (2015). Google will start mapping pollution the same way they map the streets. Retrieved from https://www.popsci.com/google-will-start-mapping-pollution-same-way-they-map-streets
5. Grantcharor, T. (2004). A randomized clinical trial of virtual reality simulation for laparoscopic skills training. BJS, 146-150.
6. Ibrahim, A., Mohamed, N. F. F., Yusof, S. A. M., Mat, R. C., & Zulkifli, A. N. (2007). Enhancing Virtual Tourism–Adoption and Implementation of Virtual Reality Techniques. Readings on tourism and hospitality, Universiti Utara Malaysia Press, Sintok, 163-180.
7. Jamie H. (2018). What is google cardboard? Find out more about cheap VR Retrieved from http://home.bt.com/tech-gadgets/computing/gaming/what-is-google-cardboard-virtual-reality-glasses-11364013436886
8. Laurence, B-R., (2017). Virtual reality: 5 films you should experience right now. Retrieved from http://time.com/4685993/five-virtual-reality-experiences/
9. Lopez, N. (2015). Google StreetView adds virtual reality support. Retrieved from https://thenextweb.com/google/2015/10/12/google-street-view-adds-virtual-reality-support/
10. Mark Z. (2014). Post on oculus VR acquisition. Retrieved from https://genius.com/Mark-zuckerberg-post-on-oculus-vr-acquisition-annotated
11. Matthews, K. (2016). Virtual reality still has 5 big problems to overcome. Retrieved from https://www.makeuseof.com/tag/virtual-reality-still-5-big-problems-overcome/
12. Muhaiyuddin, N. D. M., & Rambli, D. R. A. (2019). Calmness in Virtual Environments Enhance User’s Spatial Presence Experience. In Interactive Multimedia. IntechOpen.
13. Pan Z, Cheok A. D., Yang H., Zhu J., & Shi J. (2006). Virtual reality and mixed reality for virtual learning environments. Computers & graphics, 30(1), 20-28.
14. Rambli, D. R. A., & Muhaiyuddin, N. D. M. (2014, June). Story line in image-based Virtual Reality for enhancing spatial presence experience. In 2014 International Conference on Computer and Information Sciences (ICCOINS) (pp. 1-6). IEEE.
15. Román, A., & Lensch, H. P. (2006). Automatic Multiperspective Images. Rendering Techniques, 2 (2006), 161-171.
16. Seymour, N. E., Gallagher, A. G., Roman, S. A., O’brien, M. K., Bansal, V. K., Andersen, D. K., & Satava, R. M. (2002). Virtual reality training improves operating room performance: results of a randomized, double-blinded study. Annals of surgery, 236(4), 458.
17. Sherman, W. R., & Craig, A. B. (2003). Understanding virtual reality: interface, application, and design. San Francisco, CA: Morgan Kaufmann.
18. Steinmetz, J. T. (2017). Role of virtual reality in education. Retrieved from https://www.eturbonews.com/174015/role-virtual-reality-education/
19. Steuer, J. (1992). Defining virtual reality: Dimensions determining telepresence. Journal of communication, 42(4), 73-93.
20. Tavani, H. T. (1997). Book review: virtual reality by howard rheingold. ACM SIGCAS Computers and Society, 27(4), 31-32. doi:10.1145/270913.581268
21. Vanessa, S. (2015). Create immersive photo experiences with google photo sphere. Retrieved from https://geojournalism.org/2015/02/create-immersive-photo-experiences-with-google-photo-sphere/