Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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