1140, 1958
Buku Referensi
Salisbury, Harrison E., author
Harper & Row, 1967
Buku Teks
Sparks, Donald L.
Westview Press, 1992
Buku Teks
Ujung Pandang Hasanuddin Universitas 1978
Buku Teks
Kim, Il Sung, author
Foreign Languagea Publishing House, 1984
Buku Teks