The Korea Herald, editor
Jimoondong, 2008
Buku Teks
Kim Kyong-dong, The Korea Herald., editor
Jimoondanng, 2008
Buku Teks
Finkle, Jason L., author
John Wiley & Sons, 1968
Buku Teks
Finkle, Jason L., author
John Wiley & Sons, 1966
Buku Teks
edited John H. Kautsky
John Wiley & Sons, 1951
Buku Teks