Fairbank, John K. (John King)
George Allen and Unwin , 1982
Buku Teks
Caroline Hughes, Kheang Un, editor
Nias Press, 2011
Buku Teks
Hill, Hal, 1948-
2006
Artikel Jurnal
Peking Foreign Languages Press 1960
Buku Teks
Potter, Pitman B.
University Of Washington Press, 1992
Buku Teks