APA-referens (7:e uppl.)

Boud, D., & Feletti, G. (1997). The Challenge of problem based learning (2nd ed.). Kogan Page.

Chicago-referens (17:e uppl.)

Boud, David, och Grahame Feletti. The Challenge of Problem Based Learning. 2nd ed. London: Kogan Page, 1997.

MLA-referens (9:e uppl.)

Boud, David, och Grahame Feletti. The Challenge of Problem Based Learning. 2nd ed. Kogan Page, 1997.