Fujikake, Shizuya
Japan Travel Bureau, 1949
Buku Teks
Choate, Pat.
Business Books, 1990.
Buku Teks
Roberts, Lawrence P., author
Weatherhill, 1976
Buku Referensi
Statler, Oliver
Charles E. Tuttle Co., 1956
Buku Teks
Janeira, Armando Martins, author
Charles E. Tuttle, 1970
Koleksi Publik