Gray, Robert, author
Duffy and Snellgrove, 1996
Buku Teks
Xu, Yuanchong, author
China Intercontinental Press, 2005
Buku Teks
Dongguk University Press, 1987
Buku Teks
Burns, Robert C.
New York, 1982
Buku Teks
Fitzhugh, T.R.
Chapel Hill Univ. of North Coalina Press 1943
Buku Teks