Primadi Tabrani
Messages from ancient walls
ITB Press, 1998
Buku Teks SO
Johnson, Susan
Messages from chaos
Harper & Row, 1987
Buku Teks SO
Davis, James W., Jr.
Presidential primaries : road to the White House
Greenwood Press, 1980
Buku Teks SO
Barber, James David
The Presidential character : predicting performance in the White House
Prentice-Hall, 1977
Buku Teks
Ratih Hardjono
White tribe of Asia: an Indonesia view of Australia
Monas University, 1993.
Buku Teks SO