Method in Social Science/  A realist approach 
Sayer,Andrew 
 - 2nd.ed. 
 - Londan:  Routledge,  1992. 
 - 313 .p 
<br/><br/><label>ISBN: </label>9780415581592 
<br/><br/><label>Dewey Class. No.: </label>300.72  / SAY/M