APA استشهاد

Babbie, E. R. (1973). Survey Research Methods. Wadsworth Publishing Company,Inc..

استشهاد بنمط شيكاغو

Babbie, Earl R. Survey Research Methods. Belmont: Wadsworth Publishing Company,Inc., 1973.

MLA استشهاد

Babbie, Earl R. Survey Research Methods. Wadsworth Publishing Company,Inc., 1973.