Decker, Randall E.
Little, Brown And Company, 1980
Buku Teks
Barlett, Randall
The Free Press , 1973
Buku Teks
Charbeneau, Randall J, author
Prentice-Hall, 2005
Buku Teks
Given, William B.
Harper & Brothers Publishers, 1949
Buku Teks
Block, Stanley B., author
Japan Toppan Co. Ltd, 1990
Buku Teks