Peterson, Richard J.
Wadswarth Publishing, 1986
Buku Teks
Horton, Paul B., author
Dow Jones Irwin, 1982
Buku Teks
Acuff, F. Gene, author
The Dryden Press, 1973
Buku Teks
Cargan, Leonard, author
Wadsworth, 1985
Buku Teks
Curran, Joseph, Jr., author
McGraw-Hill, 1977
Buku Teks