Campbell, James, author
University of Illinois Press, 1992
Buku Teks
Benton, Ted, author
Palgrave Macmillan, 2011
Buku Teks
Levison, Arnold B.
Pegasus, 1974
Buku Teks
Kosso, Peter, author
Cambridge University Press, 1992
Buku Teks
Tong, Rosemarie Putnam
Westview press, 1997
Buku Teks