Gaya APA
Boone, L, E., Kurtz, D, L. (1990).
Contemporary Business 6th Ed (6th Ed).
United Stated of America:
The Dryden Press.
Gaya MLA
Boone, Louis, E., Kurtz, David, L.
"Contemporary Business 6th Ed".
6th Ed
United Stated of America:
The Dryden Press,
1990.
Text.