1. Christensson, P. (2009). YouTube Definition. Retrieved on September 28, 2018 from https://techterms.com/definition/youtube.
2. Gallegos, J. A. (2016). What is User Generated Content (and Why You Should Be Using it). Retrieved on October 30, 2018 from https://www.tintuo.com/blog/user-generated-content-definition/.
3. Muhamad, I. M. Z. (2017). Pengguna internet meningkat, Facebook paling popular di Malaysia. Retrieved on October 8, 2018 from http://malaysiagazette.com/blog/2017/11/15/pengguna-internet-meningkat-facebook-paling-popular-di-malaysia/
4. Bong S.A. Debunking Myths in Qualitative Data Analysis. Forum: Qualitative Social Research. 2002;3(2)
5. Creswell J.W. Qualitative inquiry and research design : choosing among five approaches. 3rd ed. Thousand Oaks: SAGE Publications; 2017