Cita APA (7th ed.)

Polit, D. F., & Hungler, B. P. (1995). Nursing research: Principles and methods (5th ed.). J.B. Lippincott.

Cita Chicago (17th ed.)

Polit, Denise F., i Bernadette P. Hungler. Nursing Research: Principles and Methods. 5th ed. Philadelphia, Pa: J.B. Lippincott, 1995.

Cita MLA (9th ed.)

Polit, Denise F., i Bernadette P. Hungler. Nursing Research: Principles and Methods. 5th ed. J.B. Lippincott, 1995.