APA (7th ed.) Citation

Foster, Hammersley, & Gomm. (2000). Case study method: Issues, key text. Sage publications.

Chicago Style (17th ed.) Citation

Foster, Hammersley, and Gomm. Case Study Method: Issues, Key Text. London: Sage publications, 2000.

MLA (8th ed.) Citation

Foster, et al. Case Study Method: Issues, Key Text. Sage publications, 2000.