Fundamentals of Social Research  
Earl Babbie , Lucian Benaquisto 
 - 2nd ed. 
 - Toronto:  Nelson Education ,  2010. 
 - xxvi,526 p,: 
<br/><br/><label>ISBN: </label>9780176414542 
<br/><br/><label>LC Class. No.: </label>H62  / .B32 2010