Institute for Scientific Co-Opertaion,
Majalah, Jurnal, Buletin
Institute for Scientific co-coperation, [date of publication not identified]
Majalah, Jurnal, Buletin
Blumner, Sidney M., author
Kendall Hunt, 1971
Buku Teks
Reitaku International Journal of Economic Studies,
Majalah, Jurnal, Buletin
Reder, Melvin Waren
Columbia University Press , 1947
Buku Teks