Cita APA (7th ed.)

Babbie & Earl R. (2008). The Basics of Social Research (4th ed.). Wadsworth Cengage Learning.

Cita Chicago (17th ed.)

Babbie i Earl R. The Basics of Social Research. 4th ed. Belmont, CA: Wadsworth Cengage Learning, 2008.

Cita MLA (9th ed.)

Babbie i Earl R. The Basics of Social Research. 4th ed. Wadsworth Cengage Learning, 2008.