1. Association of Indonesian Internet Service Providers, "Indonesian Internet User Survey 2019-2020 (Q2)," Center for Communication Studies, Jakarta, 2020.
2. Adoption of country‐specific business websites
3. J. Nielsen, "Usability 101: Introduction to Usability," 3 January 2012. [Online]. Available: https://www.nngroup.com/articles/usability-101-introduction-to-usability/.
4. K. R. Hadi, H. M. Az-Zahra and L. Fanani, "Analysis and Improvement of Usability of KAI Access Mobile Applications," Journal of Information Technology Development and Computer Science, vol. 2, no. 9, pp. 2742–2750, 2018.
5. A. Sriwulandari, H. Hidayati and B. Pudjoatmojo, "Analysis and Evaluation of Usability Aspects in Telkom University HRMIS Web Using," e-Proceeding of Engineering, vol. 1, no. 1, pp. 537–541, 2014.