Cullen, L. M. (Louis M.), author
Cambridge, 2003
Buku Teks
Ozaki, Robert S., author
Charles E. Tuttle, 1978
Buku Teks
Sakamoto, Taro, author
The International Society for Educational Information Press, Inc., 1975
Buku Teks
Kawatake, Toshio, 1924-, author
Kokusai Bunka Shinkokai, 1971
Buku Teks
Cambridge University Press, 2016
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