Hinton, William, author
Vintage Books, 1966
Buku Teks
Brandt, Conrad, author
George Allen and Unwin, 1959
Buku Teks
Hirth, F., author
The Statistical Department of The in Pectorate General of Customs, 1888
Buku Referensi
Ho Kan-Chih
Peking: Foreign Language Press, 1959
Buku Teks
Bianco, Lucien, author
Stanford University Press, 1971
Buku Teks