Brandon, Dick H., author
Brandon/System Press, 1970
Buku Teks
Vazsonyi, Andrew, author
Richard D. Irwin, 1980
Buku Teks
Potter, George B., author
Business, 1984
Buku Teks
Arnold, Robert R., author
John Wiley & Sons, 1978
Buku Teks
Langenbach, Robert G., author
Prentice-Hall, 1968
Buku Teks