by Paul R. Ehrlich [and others]
W.W. Norton, 1984
Buku Teks
Pugh, Michael C.
Cambridge University Press, 1989
Buku Teks
Powell, Robert
Cambridge University Press, 1990
Buku Teks
Koichi Arie
National Institute for Defense Studies, 2016
Artikel Jurnal
Westview Press, 1990
Buku Teks