Arnold, William R., author
Houghton Mifflin, 1983
Buku Teks
Giallombardo, Rose, author
John Wiley & Sons, 1982
Buku Teks
Burfeind, James W. , author
Jones and Bartlett Publishers, 2011
Buku Teks
Trojanowicz, Robert C., 1941-, author
Prentice-Hall, 1987
Buku Teks
Shaw, Clifford R.
University of Chicago, 1969
Buku Teks