Bronowski, J.
Little, Brown & Co., 1973
Buku Teks
Heilbroner, Robert L., author
Vintage Books , 1963
Buku Teks
Heilbroner, Robert L., author
UI-Press, 1982
Buku Teks
Wolff, Robert Lee, author
Harvard University Press, 1956
Buku Teks
Awuy, Tommy, author
Universitas Indonesia, 1989
UI - Skripsi (Membership)