Polit, Denise F Essentials of nursing Research : methods, appraisal,and utilization / Denise F. Polit - 6th ed - Philadelphia : Lippincott Williams & Wilkins, 2006 - 554 p : ill CD-ROM (พยาบาลศาสตร์) ISBN: 0781749727 Subjects--Topical Terms: Nursing--Research LC Class. No.: RT81.5 / P769 E8 2006