Orilia, Lawrence, author
John Wiley & Sons, 1972
Buku Teks
Fried, Louis, author
Reston Publishing, 1979
Buku Teks
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