एपीए उद्धरण

Cohen, W. A. 1. (1998). The marketing plan (2nd ed.). New York ; Chichester: John Wiley and Sons.

शिकागो स्टाइल उद्धरण

Cohen, William A. 1937-. The Marketing Plan. 2nd ed. New York ; Chichester: John Wiley and Sons, 1998.

एमएलए उद्धरण

Cohen, William A. 1937-. The Marketing Plan. 2nd ed. New York ; Chichester: John Wiley and Sons, 1998.