Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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