East, W. Gordon
Our fragmented world : an introduction to political geography / W. Gordon East, J.R.V. Prescott
Macmillan, 1975
Buku Teks SO
Jackson, W.A. Douglas
Politics and geographic relationships: readings on the nature of political geography / W. A. Douglas Jackson
Prenciton-Hall , 1964
Buku Teks SO
Culicover, Peter W.
Syntax / Peter W. Culicover
Academic Press, 1976
Buku Teks SO
Buss, Leo W.
The evolution of individuality / Leo W. Buss
Princeton University Press, 1987
Buku Teks
Ivey, Paul W.
Successful salesmanship / by Paul W. Ivey, Walter Horvath
Prentice-Hall, 1961
Buku Teks SO