Draper, Theodore
The Viking Press, 1968
Buku Teks
Draper, Theodore, 1912-2006
Penguin Books, 1967
Buku Teks
Draper, Theodore
Frederick A. Praeger, 1962
Buku Teks
Fraser, T.G.
Macmillan Press, 1995
Buku Teks
Siagian, Siar Anggretta, author
Program Pascasarjana Universitas Indonesia, 2007
UI - Tesis (Membership)