APA (7th ed.) Citation

Gomm, R., Hammersley, M., & Foster, P. (2000). Case study method: Key issues, key texts. Sage.

Chicago Style (17th ed.) Citation

Gomm, Roger, Martyn Hammersley, and Peter Foster. Case Study Method: Key Issues, Key Texts. London: Sage, 2000.

MLA (9th ed.) Citation

Gomm, Roger, et al. Case Study Method: Key Issues, Key Texts. Sage, 2000.