APA aipamena

De Vaus, D. A. (2011). Research design in social research. SAGE.

Chicago Style aipamena

De Vaus, D. A. Research Design in Social Research. London ; Thousand Oaks, Calif.: SAGE, 2011.

MLA aipamena

De Vaus, D. A. Research Design in Social Research. SAGE, 2011.