Baker, Stanley B.
Prentince-Hall, 1996
Buku Teks
Etzioni, Amitai
McGraw-Hill, 1983
Buku Teks
Perl, anthony
The University Press, 2002
Buku Teks
George E. Walker ... [and others]
Jossey-Bass, 2008
Buku Teks
Kibbee, Douglas A
Cambridge University Press,, 2016
Buku Teks