Schutt, R. K. (2009). Investigating the social world: The process and practice of research (6° edición.). Pine Force Press.
Lua i Stíl Chicago (17ú heag.)Schutt, Russell K. Investigating the Social World: The Process and Practice of Research. 6° edición. California: Pine Force Press, 2009.
Lua MLA (9ú heag.)Schutt, Russell K. Investigating the Social World: The Process and Practice of Research. 6° edición. Pine Force Press, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.