Cambridge University Press, 2017
Buku Teks
Fukuyama, Francis, author
IRCIS, 2003
Buku Teks
Rand McNally & Company, 1960
Buku Teks
M. Samidjo Dwidjosoemarto, author
S.M. Diwarno, [date of publication not identified]
Buku Klasik
Sedillot, Rene
A Mentor Book , 1976
Buku Teks