Polit, Denise F Essentials of nursing research : appraising evidence for nursing practice / Denise F. Polit and Cheryl Tatano Beck. - Seventh edition. - Philadelphia : Lippincott Williams & Wilkins, 2010. - xiv, 610 pages ; 23 cm Includes indexes. Includes bibliographical references. ISBN: 978-0-7817-8153-4 Subjects--Topical Terms: Nursing--Research. Dewey Class. No.: MAHL/Nurs'g 610.73072 P769 2010