Lethbridge, Henry J.
Hong Kong Dragonfly Books 1965
Buku Teks
Nguyen, van Canh
Stanford: Hoover Institution Press, Stanford University, 1983
Buku Teks
Ader, Emile B.
New York Barron's Educational Series 1970,
Buku Teks
Hongkong Kingsway International Publications 1981
Buku Referensi
Chang Liu
New York : Routledge , 2007
Buku Teks