Principles of classroom management :  A professional decision-making model / 
Levin James .[et..al] 
 - 2nd ed. 
 - Toronto:  Pearson,  2008. 
 - viii,280 p.: 
<br/><br/><label>ISBN: </label>9780205537167 
<br/><br/><label>LC Class. No.: </label>LB3013  / .L48  2008