Gaya APA

Polit, D, F., Hungler, B, P. (1995). Nursing Research : Principles and Methods (Fifth Edition). Philadelphia: J.B. Lippincott.

Gaya MLA

Polit, Denise, F.., Hungler, Bernadette, P.. "Nursing Research : Principles and Methods". Fifth Edition Philadelphia: J.B. Lippincott, 1995. Text.