Discovery Media, 2008
Buku Referensi
Yoo Myeong-jong, author
Discovery Media, 2008
Buku Referensi
Yoo, Myeong-jong
Discovery Media, [date of publication not identified]
Buku Teks
Indonesia. Departemen Pendidikan dan Kebudayaan
Ministry of Education and Culture, Republic of Indonesia, 2012
Buku Teks
Joe, Wanne J., author
Chung Ang University Press, 1981
Buku Teks