Rhoades, Rodney A., author
Little, Brown & Co., 1995
Buku Teks
Fox, Stuart Ira, author
McGraw-HIll, 2004
Buku Teks
Salisbury, Frank B., author
Wadsworth, 1985
Buku Referensi
ADAM, 2006
Multimedia
Moat, Albert G., author
John Wiley & Sons, 1979
Buku Teks