1. IBM (1998). The user’s conceptual model. Fundamentals/UI Models.
http://www.ibm.com/ibm/easy/design/lower/010502.html
. Accessed 21 Oct 2008.
2. Preece, J., Rogers, Y., & Sharp, H. (2007). Interaction design: Beyond human-computer interaction (2nd ed.). Chichester: Wiley. ISBN 978-0-470-01866-8.
3. Redmond-Pyle, D., & Moore, A. (1995). Graphical user interface design and evaluation (GUIDE): a practical process. New York: Prentice Hall.
4. Stoney, S., & Wild, M. (1998). Motivation and interface design: Maximising learning opportunities. Journal of Computer Assisted Learning, 14, 40–50.
5. Tzvetanova, S. (2007). Emotional interface methodology. IASDR 07. International association of societies of design research, The Hong Kong Polytechnic University, November 12th–15th.