edited by Karl Shell
MIT Press, 1967
Buku Teks
Morishima, Michio
Oxford University Press, 1970
Buku Teks
Johnson, Harry G.
George Allen and Unwin, 1958
Buku Teks
Niwata, Noriaki
Society of business and commerce, Keio University, 1971
Buku Teks
Adelman, Irma
Stanford University Press , 1973
Buku Teks