by J. Swiericzuk ... [and others]
Pitman, 1980
Buku Teks
Thomas Nelson , 1976
Buku Teks
Renouf, Alan, author
Australian Professional Publications, 1986
Buku Teks
Edited by Kajima Institute of International Peace.
Japan Times, 1971
Buku Referensi
Kajima, Morinosuke, author
Charles E. Tuttle, 1969
Buku Teks