Gaya APA

Hungler, D, F, P, B, P. (). Nursing research: principles and methods (5). : J.B. Lippincott Company.

Gaya MLA

Hungler, Denise, F., Polit,, Bernadette, P.. "Nursing research: principles and methods". 5 : J.B. Lippincott Company, . Text.