McCullough, Helen Craig
Princeton University Press, 1980
Buku Teks
Columbia University Press, 1959
Buku Teks
University of Tokyo , 1968
Buku Teks
Fukuzawa, Yukichi, 1835-1901, author
Columbia University Press, 1960
Buku Teks
Heneveld, Word
The World Bank , 1996
Buku Teks