7Carl Rogers. Freedom to Learn for the 80s' [M]. Columbus, OH: Charles E. Merrill Publishing Company, 1983 ; 120.
8Fyrenius A, Bergdahl B, Silen C, et al. Lectures in problem- based learning'- Why, when and how? An example of interactive lecturing that stimulates meaningful learning[J]. Medical Teacher 2005,27(1): 61-65.
9Carl Rogers. On Becoming a Person: A Therapist's View of Psychotherapy[M]. Boston, MA: Houghton Mifflin,1961:288.
10Shamsan B, Syed AT. Evaluation of problem based learning course at college of medicine, qassim university, saudi arabia [ J ]. Int J Health Sci(Qassim) ,2009,3 (2) :249 - 258.
