Christensen, Larry B. <br/><br/>
Research methods design and analysis 
Larry B. Christensen, 
 - 12th ed. 
 - Boston :  Pearson  2014. 
 - 522 p. 
<br/><br/><label>ISBN: </label>9780205961252 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Experimental Design.
<br/><br/><label>Dewey Class. No.: </label>001.4  / CHR/RES