Wooldridge, Jeffrey M., 1960-, author
South-Western College, 2000
Buku Teks
by George G. Judge [and others]
John Wiley & Sons, 1980
Buku Teks
Davidson, Russell, author
Oxford University Press, 1993
Buku Teks
Ramanathan, Ramu, author
Orlandno Harcourt Brace Jovanovich College, 1992
Buku Teks
Johnson, Aaron C., author
Macmillan, 1989
Buku Teks