Reference handbook of research and statistical methods in psychology : For students and professionals 
yaremko, R.M. 
 - Second edition...[et. al.]. 
 -  Harper and Row, Publishers.  1982 
 - 335 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>9-71080102-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychological research -- Terminology.
<br/><br/><label>Dewey Class. No.: </label>150.72 Ya2 1982