APA (7th ed.) Citation

Hamel, J., Dufour, S., & Fortin, D. (1993). Case study methods. Sage.

Chicago Style (17th ed.) Citation

Hamel, Jacques, Stephane Dufour, and Dominic Fortin. Case Study Methods. London: Sage, 1993.

MLA (8th ed.) Citation

Hamel, Jacques, et al. Case Study Methods. Sage, 1993.