The good research guide / 
Martyn Denscombe. 
 - 3rd ed. 
 - [S.l.] :  McGraw-Hill Education,  2007. 
 - p. 
<br/><br/><label>ISBN: </label>0335220223 9780335220229 
<br/><br/><label>LC Class. No.: </label>D448 2007