Gaya APA

Polit, D., Hungler, B. (1978). Nursing research principles and methods (Ed. 2). Philadelphia: J.B. Lippincott.

Gaya MLA

Polit, Denise., Hungler, Bernadette. "Nursing research principles and methods". Ed. 2 Philadelphia: J.B. Lippincott, 1978. Text.