Popkin, Gary S., author
Mifflin Company, 1981
Buku Teks
Crawford, F. Robert, author
Prentice-Hall, 1973
Buku Teks
Carter, Norman H., author
Dickenson , [s.a.]
Buku Teks
Vazsonyi, Andrew, author
Richard D. Irwin, 1980
Buku Teks
Potter, George B., author
Business, 1984
Buku Teks