edited by Brian L. Cutler
      
         Sage, 2008
       Buku Referensi
   
Taylor, Sandie
      
      
         Routledge, 2019
       Buku Teks SO
   
Arrigo, Bruce A.
      
      
         Academic Press, 2003
       Buku Teks SO
   
Wrightsman, Lawrence S.
      
      
         Brooks/Cole , 1998
       Buku Teks
   
Wrightsman, Lawrence S.
      
      
         Brooks/Cole, 1991
       Buku Teks