Polit, Denise F. Nursing research : generating and assessing evidence for nursing practice / Denise F. Polit, Cheryl Tatano Beck - 8th ed. - Philadelphia : Wolters Kluwer Health/lippincott Williams & Wilkins, c2008 c2008 - xviii, 796 p. : ill. (some col.) ; 24 cm. Includes bibliographical references and index. ISBN: 978-0-7817-9468-8 Subjects--Topical Terms: Nursing--Research--Methodology