Koff, Theodore H.
Little, Brown and Company, 1982
Buku Teks
Beng, OOi Kee, author
Institute of South East Asia Studies, 2013
eBooks
Maton, Kenneth I., author
Oxford University Press, 2016
eBooks
Artikel Jurnal
Adamson, Lee J., author
Ronald Press, 1964
Buku Teks