editor, Jack Challoner
Balai Pustaka, 1997
Buku Referensi
Kim, Tae-Hyung
Elex Media Komputindo, 2013
Buku Teks
Park, Mi-hyun
Elex Media Komputindo, 2013
Buku Teks
Oxlade, Chris
Mustard, 1999
Buku Referensi
editor in chief, Charles A. Ford
Encyclopedia Britannica Educational Corporation, 1969
Buku Referensi