Modern China Press , 1981
Buku Teks
Goverment Information Office, 2002
Buku Referensi
Jackson, Gabriel
Princeton University Press, 1972
Buku Teks
Schurmann, Franz, author
Vintage Books, 1967
Buku Teks
Botombele, Bokonga Ekanga
The Unesco Press, 1976
Buku Teks