Bechhofer, F., & Paterson, L. (2000). Principles of research design in the social sciences. Routledge.
Lua i Stíl Chicago (17ú heag.)Bechhofer, Frank, agus Lindsay Paterson. Principles of Research Design in the Social Sciences. London ; New York: Routledge, 2000.
Lua MLA (8ú heag.)Bechhofer, Frank, agus Lindsay Paterson. Principles of Research Design in the Social Sciences. Routledge, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.