Wheeler, Ruric E., author
John Wiley & Sons, 1979
Buku Teks
Brixey, John C., author
Holt, Rinehart and winston, 1954
Buku Teks
Brixey, John C., author
Holt, Rinehart and winston, 1954
Buku Teks
Hemming, 1998
Multimedia
Calvert, James, author
McGraw-Hill, 1994
Buku Teks