Henkel, Daniel P.
McGraw-Hill, 2002
Buku Teks
Gabriel, Barbra L.
American Society for Metals, 1992
Buku Teks
Bernhardt, Roger
St. Paul, Minn, 1991
Buku Teks
Emanuel, Steven
Emanuel Law Outlines, 1993
Buku Teks
Bernhardt, Robert
West Publishing, 1991
Buku Teks