Gaya APA
HOPKINS,David S.. (1981).
The Marketing Plan .
USA:
The Conference Board.
Gaya Chicago
HOPKINS,David S..
The Marketing Plan.
USA:
The Conference Board,
1981.
Text.
Gaya MLA
HOPKINS,David S..
The Marketing Plan.
USA:
The Conference Board,
1981.
Text.
Gaya Turabian
HOPKINS,David S..
The Marketing Plan.
USA:
The Conference Board,
1981.
Print.