Fried, Louis, author
Reston Publishing, 1979
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
Lott, Richard W., author
Prentice-Hall, 1967
Buku Teks