Leedy, P. D., Ormrod, J. E. and Johnson, L. R. <br/><br/>
Practical Research :   planning and design 

 - 12th ed. 
 - Harlow :  Pearson,  2021. 
 - 479p. :  ill. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9781292339245 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research--Methodology.
<br/><br/><label>LC Class. No.: </label>Q 180.55 .M4L4 2021