Gerring, J. (2007). Case study research: Principles and practices. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Gerring, John. Case Study Research: Principles and Practices. New York: Cambridge University Press, 2007.
Lua MLA (9ú heag.)Gerring, John. Case Study Research: Principles and Practices. Cambridge University Press, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.