Cita APA (7th ed.)

BABBIE, E. R. (1973). Survey research methods. Wadsworth Pub. Co.

Cita Chicago (17th ed.)

BABBIE, Earl R. Survey Research Methods. Belmont: Wadsworth Pub. Co, 1973.

Cita MLA (9th ed.)

BABBIE, Earl R. Survey Research Methods. Wadsworth Pub. Co, 1973.