APA ציטוט

 Babbie, E. (1990).  Survey research methords.  Wadsworth Pub. Co.

Trích dẫn kiểu Chicago

 Babbie, Earl.  Survey Research Methords.  Wadsworth Pub. Co, 1990.

ציטוט MLA

 Babbie, Earl.  Survey Research Methords.  Wadsworth Pub. Co, 1990.