Smith, Martin, author
ISEAS, 2007
Buku Teks
edited by K.M. de Silva
Westview Press, 1988
Buku Teks
Cady, John F., author
Harvard University Press, 1976
Buku Teks
Bertrand, Jacques, author
Cambridge, 2005
Buku Teks
edited by Astri Suhrkel and Lela Garner Noble
Frederick A. Praeger, 1977
Buku Teks