Dimock, Marshall Edward
Henry Holt, 1953
Buku Teks
Isaacs, Asher, 1902-1963
Van Nostrand , 1964
Buku Teks
editor, B. Wiwoho
Indonesia National Development Information Office, 1996
Buku Teks
Heilbroner, Robert L.
Vintage Books , 1963
Buku Teks
Phelps, Edmund S.
Orton & Co , 1962
Buku Teks