Bovee, Courtland L., author
Richard D. Irwin, 1989
Buku Teks
Arens, William F., author
Irwin /McGraw-Hill, 1999
Buku Teks
Hotchkiss, George Burton, author
Alexander Hamilton Institute , 1961
Buku Teks
Wells, William D., author
Prentice-Hall, 2000
Buku Teks
Weilbacher, William M
Macmillan, 1979
Buku Teks