Kalof, Linda. <br/><br/>
Essentials of social research / 
Linda Kalof, Amy Dan and Thomas Dietz. 
 - Maidenhead, England :  Open University Press,  2008. 
 - vii, 225 p. :  ill. ;  25 cm. 
<br/><br/>References : p. [211]-218. 
<br/><br/><label>ISBN: </label>9780335217830  RM438.00 0335217834 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research.