Routledge, 1998
Buku Teks
John Funston
ISEAS, 2001
Buku Teks
Gordon, Bernard K., author
Prentice-Hall, 1966
Buku Teks
edited by Philip Warren Thayer
Johns Hopkins Press, 1956
Buku Teks
Vandenbosch, Amry, author
University of Kentucy Paperbacks, 1967
Buku Teks