Weimer, David L., author
Prentice-Hall, 1992
Buku Teks
edited by David A. Caputo
W.H. Freeman, 1977
Buku Teks
Nagel, Stuart S.
The University of Alabama Press, 1984
Buku Teks
Helen Margetts, Perri 6, Christopher Hood, editors
Oxford University Press, 2012
Buku Teks
Krone, robert M.
John Wiley & Sons, 1980
Buku Teks