Trochim, William M. <br/><br/>
Research methods :  The essential knowledge base 

 - 2nd ed. 
 - India :  Cenage Learning,  2016. 
 - xxii, 422p. 
<br/><br/><label>ISBN: </label>9788131530856 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biophysics