Buku Antar Bangsa , 1995
Buku Referensi
Montagu, Ashley, 1905-1999, author
World Publishing, 1957
Buku Teks
Montagu, Ashley, 1905-1999, author
New American Library, 1960
Buku Teks
Cain, John
BBC, 1992
Buku Teks
Toynbee, Arnold J., translator
Osford University Press, 1969
Buku Teks