Lamb, Richard G., author
Prentice-Hall, 1995
Buku Teks
Levitt, Joel, author
Industrial Press, Inc., 2009
Buku Teks
William Wrenall, Quarterman Lee, editors in chief
McGraw-Hill, 1994
Buku Referensi
Bangs, John R., author
Alexander Hamilton Institute, 1955; 1961
Buku Teks
by Harold T. Amrine [and others]
Prentice-Hall, 1993
Buku Teks