Strother, Edgar E.
North-China Daily News and Herald , 1927
Buku Teks
Priyanto Wibowo, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2007
Buku Teks
Franklin, Benjamin, author
The Spencer Press, 1936
Buku Teks
Blundell, Nigel, author
Octopus Books Limited, 1980
Buku Teks
Hung, William
Harvard University Press, 1952
Buku Teks