1. Astin AW: What matters in college: four critical years revisited. 1993, San Francisco, CA: Jossey-Bass
2. Pascarella ET, Terenzini PT: How collage affects students. A third decade of research. 2005, San Francisco, CA: Jossey-Bass
3. Fredericks JA, Blumenfeld PC, Paris AH: School engagement: potential of the concept, state of the evidence. Rev Educ Res. 2004, 74: 59-109. 10.3102/00346543074001059.
4. Chapman E: Alternative approaches to assessing student engagement rates. Practical Assess Res Eval. 2003, 8 (13): Retrieved June 12, 2012, from http://www.pareonline.net/getvn.asp?v=8&n=13
5. Coates H: A model of online and general campus-based student engagement. EDUCAUSE Q. 2007, 1: 66-68.