Levitt, Joel
Industrial Press, Inc., 2009
Buku Teks
William Wrenall, Quarterman Lee, editors in chief
McGraw-Hill, 1994
Buku Referensi
Bangs, John R.
Alexander Hamilton Institute, 1955; 1961
Buku Teks
Amrine, Harold T.
Prentice-Hall, 1975
Buku Teks
by Harold T. Amrine [and others]
Prentice-Hall, 1993
Buku Teks