Rollason, Russell G.
Alternative Pub. Cooperative, 1981
Buku Teks
Unesco, 1976
Buku Teks
edited by Michael Stohl and Harry R. Targ
Schenkman Publishing Company, 1982
Buku Teks
Bedjaoui, Mohammed
Gunung Agung, 1983
Buku Teks
Makarczyk, Jerzy
Martinus Nijhoff, 1988
Buku Teks