The University of Hong Kong, 1998
Buku Referensi
Bonavia, David, author
Columbus Books, 1984
Buku Teks
Universitas Indonesia, 1999
UI - Skripsi (Membership)
Maunder, W. F.
Hong Kong University Press, 1969
Buku Teks
Merry, Malcolm
Butterworth, 1985
Buku Teks