Garoutte, Michael P., author
John Wiley & Sons, Inc, 2007
Buku Teks
Smith, janice gorzynski, author
McGraw-Hill, 2010
Buku Teks
Baum, Stuart J.
Macmillan, 1972
Buku Teks
edited by Brian R. Pamplin
Pergamon Press , 1981
Buku Teks
Holum, John R., author
John Wiley & Sons, 1987
Buku Teks