International Monetary Fund, 1988
Buku Teks
School Government Publishing Co., [date of publication not identified]
Buku Referensi
Soedjatmoko, 1922-1989, author
Cornell University Press, 1960
Buku Teks
editor by Anthony Tatlow
Hong Kong University Press, 1982
Buku Referensi
American Assoc. for The Advancement of Science, 1973
Buku Teks