Trochim, William M. K.,  <br/><br/>
Research methods :  the essential knowledge base / 
William M. Trochim, James P. Donnelly, Kanika Arora. 
 - Boston, MA :  Cengage Learning,  [2016] 
 - xxii, 422 pages :  some colour, illustrations ;  25 cm 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9781133954774 (paperback) 1133954774 (paperback) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research --Methodology
<br/><br/><label>LC Class. No.: </label>Q180.55.M4 T76