Kumar, Ranjit. <br/><br/>
Research Methodology :  A step-by-step Guide for Beginners / 
Ranjit Kumar. 
 - Fourth edition 
 - New Delhi, India :  SAGE Publications India Pvt Ltd,  2014. 
 - 399 p. :  il., tablas ;  24 cm. 
<br/><br/><br/>Inglés 
<br/><br/><label>ISBN: </label>9789351501336 
<br/><br/><label>Dewey Class. No.: </label>300.721