Cita APA (7th ed.)

Rubin, A., & Babbie, E. (1989). Research methods for social work. Wadsworth.

Cita Chicago (17th ed.)

Rubin, Allen, i Earl Babbie. Research Methods for Social Work. Belmont, Calif: Wadsworth, 1989.

Cita MLA (9th ed.)

Rubin, Allen, i Earl Babbie. Research Methods for Social Work. Wadsworth, 1989.