1. A. Jiwasiddi, https://bbs.binus.ac.id/management/2017/12/hal-hal-penting-dalam-sebuah-website (2017)
2. D. Ahlstrom, A. Cockburn, C. Gutwin, and P. Irani, Why it’s Quick to be Square: Modelling New and Existing Hierarchical Menu Designs in Proceedings of the 28th International Conference on Human Factors in Computing Systems, CHI 2010, Atlanta, Georgia, USA, April 10-15, 2010, 1371–1380 (2010)
3. M. Denhaak, M. De Van Jong, and P.J. Schellens, Behaviour & Information Technology, 22, 7 37–41 (2003)
4. A.J. Head. Design wise: a guide for evaluating the interface design of information resources. (Information Today, Inc., 1999)
5. Current practice in measuring usability: Challenges to usability studies and research