Westview Press , 1991
Buku Teks
edited by Susan Hart
Routledge , 1996
Buku Teks
Peters, B. Guy, author
Sage, 2018
Buku Teks
edited by John K. Ryan
The Catholic University of America Press, 1963
Buku Teks
Rotenberg, Daniel L., author
Little,Brown and Company, 1967
Buku Teks