Cresswell, John W. <br/><br/>
Research design :  qualitative, quantitative and mixed method approaches / 
by John W. Cresswell. 
 - 2nd ed. 
 - Thousand Oaks, Calif. :  Sage,  c2003. 
 - xxvi, 246p. : ill. ; 23 cm. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0761924426 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research--Methodology.<br/>Social sciences--Statistical methods.