Ranjit Kumar <br/><br/>
Research methodology :  A step-by-step guide for beginners 

 - 5th ed. 
 - New Delhi :  Sage,  2019. 
 - xxi, 503p. 
<br/><br/><label>ISBN: </label>9781526449900 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biophysics