Korean Overseas Information Service, 1978
Buku Teks
Hick, John H., 1922-2012, author
Prentice-Hall, 1990
Buku Teks
edited by Craig Calhoun, Eduardo Mendieta, Jonathan Vanantwerpen
Polity Press, 2013
Buku Teks
Kodansha International, 1972
Buku Teks
edited by Vergilius Ferm
Littlefield, Adam and Co., 1959
Buku Referensi