Franklin

MLA

Polit-O'Hara, Denise F, and Bernadette P Hungler. Nursing Research : Principles and Methods. Second edition. .

APA

Polit-O'Hara, D. F, & Hungler, B. P. Nursing research : principles and methods. Second edition. .

Chicago

Polit-O'Hara, Denise F., and Bernadette P Hungler. Nursing Research: Principles and Methods. Second edition.