Ingram, Robert W., author
South-Western Publishing, 2004
Buku Teks
Garrison, Ray H.,
Business Publications, 1985
Buku Teks
Garrison, Ray H.,
Irwin, 1997
Buku Teks
Garrison, Ray H.,
Irwin, 1988
Buku Teks
DeCoster, Don T., author
Melville Publishing Company, 1974
Buku Teks