COHEN, Jacob <br/><br/>
Statistical power analysis for the behavioral sciences / 
Jacob Cohen. 
 - 2nd ed.-- 
 -- Hillsdale [etc.] :   Lawrence Erlbaum,   1988 
 - xxi, 567 p. 
<br/><br/>ISBN 0-8058-0283-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ciencias sociales - Métodos estadísticos
<br/><br/><label>Universal Decimal Class. No.: </label>519.22-77