O, Song-un
Darakwan, 2009
Buku Teks
O, Song-un
Darakwan, 2009
Buku Teks
The National Institute of the Korean Language & The International Korean Language Foundation, 2008
Buku Teks
Muhammad Ihsan
2015
UI - Makalah dan Kertas Kerja
In, Ku Kim-Marshall
Hankookmunhwasa, 2006
Buku Teks