University Press, 1949
Buku Teks
Nelson, Gary M., author
Barret-Koehler Publishers, Inc., 2000
Buku Teks
Shulman, Lawrence, author
Brooks/Cole Cengage Learning, 2012
Buku Teks
Mott, Sandra R., author
Addison-Wesley, 1990
Buku Teks
Routledge, 2005
Buku Teks