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Buku Teks
New York, 2006
Buku Teks
[publisher not identified], [date of publication not identified]
Naskah
Yi, Kyong-ja, author
Munidang, 2009
Buku Teks
Pak, Song-sil, author
Tanguk Taehakkyo Chulpanbu , 2005
Buku Referensi