Historical research : A guide 
McDowell, W.H. 
 -  Pearson Education.  2002 
 - vii,273 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>0-582-29459-2 
<br/><br/><label>Dewey Class. No.: </label>001.432 M14h 2002