Danes, Popo
Imaji Media Pustaka, 2011
Buku Referensi
Academy Editions, 1990
Buku Referensi
Lim, William Siew Wai, 1932-
Periplus, 1998
Buku Referensi
Salvadori, Mario
Prentice-Hall, 1963
Buku Teks
Richards, J.M.
Newton Abbot: Davis and Charles, 1974
Buku Teks