Polit, Denise F. Nursing research : principles and methods / Denise F. Polit, Bernadette P. Hungler. - Philadelphia : Lippincott, 1999. - ix,757 pages : 24 centimeter. ISBN: 0781715628 Subjects--Topical Terms: Nursing--Methodology--Research Dewey Class. No.: FOR 610.73 P76m 1999