Hungerford, Thomas W., author
Thomson Brooks/Cole, 2005
Buku Teks
Barnett, Raymond A., author
McGraw-Hill, 2000
Buku Teks
Dwyer, David, author
Brooks/Cole, 2000
Buku Teks
Wheeler, Ruric E., author
John Wiley & Sons, 1996
Buku Teks
Gager, William A., author
Macmillan, 1968
Buku Teks