APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Hamel, Jacques, Stéphane Dufour, and Dominic Fortin. Case Study Methods. Newbury Park, Calif.: Sage Publications, 1993.

MLA (9th ed.) Citation

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