Korean language in culture and society
edited by Sohn Ho-min
University of Hawaii, 2006
 Buku Teks
Sampaio, João, 1929-
Colloquial Portuguese : a complete language course
Routledge, 1995
 Buku Teks SO
Le Fleming, Svetlana
Colloquial Russian: a complete language course
Routledge, 1995
 Buku Teks SO
King, Gareth
Colloquial english : a complete english language course
Routledge, 2005
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Michalak-Gray, Joanna
Complete Polish
Teach Yourself , 2014
 Buku Teks SO