SAGE directions in education psychology/ 
Salkind,Neil J. 
 - 1st.ed. 
 - London:  Sage,  2011. 
 - 328 
<br/><br/><label>ISBN: </label>9780857021786 (set) 
<br/><br/><label>Dewey Class. No.: </label>150.7  / SAL/S