Lewin, Kurt
Harper & Brothers, 1948
Buku Teks SO
Williams, Malcolm, 1953-
Routledge, 2000
Buku Teks SO
Naerssen, Frits Herman van
Southeast Asia Institute, 1947
Buku Teks
Inbar, Michael
Free Press, 1972
Buku Teks SO
Layder, Derek
Macmillan, 1990
Buku Teks SO