Richie, Donald
Charles E. Tuttle, 1995
Buku Teks SO
Adams, Edward B.
Seoul International Pub. House, 1972
Buku Teks SO
Kim, Dong-uk
Hollym , 2006
Buku Teks
Kim Dong-uk
Hollym Corp Pub., 2006
Buku Teks SO
Kyoto University of Education I Fujinomori-cho, 2006
Majalah, Jurnal, Buletin