APA aipamena

Payne, G., & Payne, J. (2004). Key concepts in social research. SAGE.

Chicago Style aipamena

Payne, Geoff, and Judy Payne. Key Concepts in Social Research. London: SAGE, 2004.

MLA aipamena

Payne, Geoff, and Judy Payne. Key Concepts in Social Research. SAGE, 2004.