Wright, George, author
New York: John Wiley & Sons, 2001,
Buku Teks
Wright, George, author
John Wiley & Sons, 2001
Buku Teks
Marilyn R. Seymann, editor
Glenlake Publishing Company, 1998
Buku Referensi
Sheikh, Nauman, author
Elsevier, 2013
Buku Teks
Walter, Ingo, author
Institute of Southeast Asian Studies, 1993
Buku Teks