Davidson, William H., author
John Wiley & Sons, 1982
Buku Teks
Vernon-Wortzel, Heidi, author
John Wiley & Sons, 1991
Buku Teks
Sanyal, Rajib N., author
Prentice-Hall, 2001
Buku Teks
Hodgetts, Richard M., author
McGraw-Hill, 1991
Buku Teks
Farmer, Richard N., author
Dickinson, 1968
Buku Teks