Polit, Denise F. Essentials of Nursing Research appraising evidence for nursing practice Denise F. Polit & Cheryl Tatano Beck - 8th ed. international edition - Philadelphia Wolters Kluwer/ Lippincott Williams & Wilkins 2014 - xviii. 493p. ill. color 25.5cm ISBN: 9781451176803 LC Class. No.: RT81.5 / .P63