APA (7e ed.) Bronvermelding

Babbie, E. (2004). The Practice of Social Research (10th.). Thomson Learning.

Chicago (17e ed.) Bronvermelding

Babbie, Earl. The Practice of Social Research. 10th. Singapore: Thomson Learning, 2004.

MLA (9e ed.) Bronvermelding

Babbie, Earl. The Practice of Social Research. 10th. Thomson Learning, 2004.