Cardenas, Alfonso F., author
Allyn and Bacon, 1979
Buku Teks
Date, C.J., author
North Holland, 1975
Buku Teks
Martin, James, author
Prentice-Hall, 1976
Buku Teks
Katzan, Harry, Jr., author
Van Nostrand Reinhold , 1975
Buku Teks
Ross, Ronald G., author
Amacom, 1978
Buku Teks