Cita APA (7th ed.)

Singleton, R. A., & Straits, B. C. (2005). Approaches to social research (4th ed.). Oxford.

Cita Chicago (17th ed.)

Singleton, Royce A., i Bruce C. Straits. Approaches to Social Research. 4th ed. New York: Oxford, 2005.

Cita MLA (9th ed.)

Singleton, Royce A., i Bruce C. Straits. Approaches to Social Research. 4th ed. Oxford, 2005.