Eriksen, Thomas Hylland, author
Plutto Press, 2004
Buku Teks
The Ronald Press Company, 1965
Buku Teks
Jennings, Jesse D., author
McGraw-Hill, 1972
Buku Teks
Kuper, Adam, author
Routledge, 1996
Buku Teks
Beals, Ralph L., author
Macmillan, 1977
Buku Teks