Polit, Denise F. Essentials of nursing research : appraising evidence for nursing practice. - 7 th ed. - Philadelphia : Wolters Kluwer Health/Lippincott Williams & Wilkins, 2011. - vix, 610 p. ill. 23 cm. Includes bibliographical references and index. ISBN: 9788184732191 LCCN: Subjects--Topical Terms: NursingNursingNursing Research Dewey Class. No.: National Library of Medicine Call No.: WY 20.5 PE 2011 /