The National Institute of the Korean Language & The International Korean Language Foundation, 2008
Buku Teks
Scharbach, Alexander, author
McGraw-Hill , 1965
Buku Teks
edited by Collin Harrison
New York, Routledge
Buku Referensi
edited by Susan E. Israel, Gerald G. Duffy
Routledge, 2009
Buku Referensi
McGraw-Hill, 1990
Buku Teks