Nanney, J. Louis, author
Allyn and Bacon, 1980
Buku Teks
Koshy, Thomas, author
McGraw-Hill, 1986
Buku Teks
Carico, Charles C., author
John Wiley & Sons, 1983
Buku Teks
Gager, William A., author
Macmillan, 1968
Buku Teks
Barnett, Raymond A., author
McGraw-Hill, 2001
Buku Teks