McGraw-Hill, 1960
Buku Teks
Black, Wendy
PBC International, 1994
Buku Referensi
Archipelago Press, 1994
Buku Referensi
Entwistle, Jill, author
Roto Vision SA, 2000
Buku Referensi
Cuito, Aurora, author
Hongkong : Page One Publishing, 2002,
Buku Referensi