Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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