Coulshed, Veronica, author
Macmillan, 1988
Buku Teks
edited by Bruce A. Thyer and John S. Wodarski
John Wiley, 2007
Buku Teks
Pritchard, Colin, author
Routledge, 2006
Buku Teks
Cohen, Nathan Edward, author
National Ass. of Workker, 1964
Buku Teks
Coppock, Vicki, author
SAGE, 2010
Buku Teks