Ermias Kibreab. <br/><br/>
SPSS in social science research :  statistical tests in research with SPSS applications /  [manuscript] : 
by Ermias Kibreab. 
 - Germany: :  Lambert Academic publishing;,  c2011. 
 - 117 p. 
<br/><br/><label>ISBN: </label>9783844301878 (pbk)