Spector, Paul E. <br/><br/>
Research designs 
Paul E. Spector 
 - Newbury Park  Sage Publications  1981 
 - 80 p.  gráf.  22 
 - A Sage University paper  Quantitative applications in the social sciences  23 .
<br/><br/>Inclúe referencias bibliográficas (p. 78-80) 
<br/><br/><label>ISBN: </label>0-8039-1709-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Estatística