4Peter Schwartz, Stewart Mennin and Graham Webb. Problem- based learning: case studies, experience and practice. London: Kogan Page, 2001, 3.
5Peter Schwartz, Stewart Mennin and Graham Webb. Problem -based learning" case studies, experience and practice. London: Kogan Page, 2001, 4.
6Barbara J Duch, Susan E Groh, and Deborah E Allen. The power of problem - based learning: a practical "how to" for teaching undergraduate courses in any discipline. Sterling. Va. : Stylus Pub., 2001.6.7 40-44. 9.
7Peter Schwartz, Stewart Mennin and Graham Webb. Problem - based learning: case studies, experience and practice. London: Kogan Page, 2001, p 2.
8Schidt, H.G., Moust. J. H. C. (2000),Factors affecting small - group tutorial learning: A review of research, p28.
9Hmelo, C.E. Problem - based learning: Development of independent thinking and learningskills: A study of medical problem - solving and problem - based learning. New York: Simon& Schuster Macmillan, 1996. p173 - 182.
10Dorothy H.E., Cindy E. H, (2000) Problem - Based Learning: A Research Perspective onLearning Interactions, London: Lawrence Erlbaum Associates, Publishers. p66 -68.
