3What is the role of the problem [DB/OL].http://www.unsa.edu/team/cpbl/whatis/matrix/prob.hmal.
4What is the cognitive focus [DB/OL]. http://www.unsa.edu/team/cpbl/whatis/matrix/cog.hmtl .
5Problem Based Learning: An Overview[DB/OL]. htrp://users.erols.corn/allnutt/pbl/pbloverview.hmtl .
6Chen Swee Eng. Problem-based Learning: Educational tool or philosophy[DB/OL], http://www.tp.edu.sg/pblconference/full/S.E.Chen.pdf.
7Blunden.A.Problem based learning and Its Application to In-house Law Firm Training Journal of Professional Legal Education[DB/OL]. htrp://teaching.polyu.edu.hk/datafiles/R101 .pdf.
8Robert Delisle.How to Use Problem-Based Learning in the Classroom[DB/OL].htrp://www.ascd.org/publications/books/1997delisle/1997delisletoc.html.
9Dennis Sale.Assessing Specific Types of Thinking in Problem based learmng Activities[DB/OL]. http://www.tp.edu.sg/pblconference/ fun/DennisSale.pdf.
10What are the benefits of PBL[DB/OL]. http://www2.unsa.edu/programs/pbl/whatis/whatis/slide 10.html.
