Malin, Martin H., author
Thomson/West, 2011
Buku Teks
Edwards, Harry T.
The Michie Company, 1991
Buku Teks
Flynn, Norman, author
Harvester, 1990
Buku Teks
Van Wart, Montgomery, author
Garland, 1998
Buku Teks
Jones, Rowan, author
Financial Times Prentice Hall, 2010
Buku Teks