Flanagan, William G., author
Allyn and Bacon, 1990
Buku Teks
Jong, Wouter de
Gajah Mada University Press, 1987
Buku Teks
editors, Martin van Bruinessen, Julia Day Howell
Rajawali, 2008
Buku Teks
Northam, Ray M., author
John Wiley & Sons, 1979
Buku Teks
Carfax Publishing Company, 2018
Majalah, Jurnal, Buletin