Guknip Gugowon
Hangung Munhwa sa, 2009
Buku Teks
Hahn, Gap-Soo
Korean Oberseas Information Service, 1981
Buku Teks
Gschossmann-Hendershot, Elke F
Jakarta : Erlangga
Buku Teks
Goodman-Stephens, Bryan, author
E.J. Arnold, 1987
Buku Teks
Pandey, Ajay, author
Gramedia, 2006
Buku Teks