Parker, George E.
Prentice-Hall, 1988
Buku Referensi
Rathbone, Robert R., author
Addison-Wesley Publishing Company, 1985
Buku Teks
edited by Linn C. Stuckenbruck
Addison-Wesley, 1981
Buku Referensi
Chatburn, Robert L., author
Jones & Bartlett Learning, 2011
Buku Teks
David Linden, editor in chief
McGraw-Hill, 1995
Buku Referensi