Edmunds, June, 1961-, author
Routledge, Taylor & Francis Group, 2017
Buku Teks
Mayer, Ann Elizabeth, author
Westview Press, 1995
Buku Teks
Selby, David, author
Cambridge University Press, 1988
Buku Teks
Unesco, 1970
Buku Teks
edited by Alice H. Henkin
Aspen Institute for Humanistic Studies, 1979
Buku Teks