Gibson, Charles H., author
South Western College , 2001
Buku Teks
Gibson, Charles H., author
Thomson, 2005
Buku Teks
Gibson, Charles H., author
PWS-KENT Publishing , 1989
Buku Teks
Gibson, Charles H., author
South-Western, 1992
Buku Teks
Winston, Kwok Chee Chiu, author
pearson Prentice Hall, 2007
Buku Teks