N.J. L. Erlbaum, 1990
Buku Teks
Mani, Sunil, editor
New York : United Nations University Press, 2004,
Buku Teks
Montgomery, Robert L., author
Little, Brown, 1962
Buku Teks
Whitehead, Alfred North, 1861-1947, author
The New American Library, 1933
Buku Teks
edited by Michael W. Alssid and William Kenney
Halt, Rinchart and Winston, 1964
Buku Teks