2Barnes LB, Christensen CR, Hansen AJ. Teaching with Cases at the Harvard Business School [ C]. Teaching and the Case Method Bos- ton: Harvard Business School Press, 1994.
3Usmani A, Sultan ST, Ali S, et al. Comparison of students and fa- cilitators'perception of implementing problem based learning [J]. J Pak Med Assoc, 2011, 61(4):332-335.
5Trevor Stanley, Stephen Marsden. Problem-based learning: Doesaccounting education need it. [J]. J. of Acc. Ed. 2012, (30):267 - 289.
6Nader Barzegar, Shahrooz Farjad, Nahid Hosseini. The effect ofteaching model based on multimedia and network on the studentlearning (case study: Guidance schools in Iran) [ J ]. Procedia -Social and Behavioral Sciences, 2012 (47): 1263-1267.