SM Entertainment, 2014
Buku Teks
S.M. Entertainment, 2014
Buku Teks
Comrie, Bernard, 1947-, author
Cambridge University Press, 1985
Buku Teks SO
Hornstein, Norbert, author
MIT Press, 1990
Buku Teks
Koehn, Edward Henry
Summer Institute of Linguistics, [date of publication not identified]
Buku Teks