Denise F. Polit, Cheryl Tatano Beck <br/><br/>
Essentials of nursing research :  appraising evidence for nursing practice 
by Denise F. Polit 
 - 9th ed 
 - New York  Wolterskluwer  , 2018 
<br/><br/><label>ISBN: </label>9789351298335 
<br/><br/><label>LC Class. No.: </label>RT81  / P63