Babbie, E. (2004). The Practice of Social Research (10th.). Thomson Learning.
Chicago-referens (17:e uppl.)Babbie, Earl. The Practice of Social Research. 10th. Singapore: Thomson Learning, 2004.
MLA-referens (9:e uppl.)Babbie, Earl. The Practice of Social Research. 10th. Thomson Learning, 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.