Gaya APA
BECKWITH, Harry. (1997).
Selling the invisible : a field guide to modern marketing .
New York:
Warner Books.
Gaya Chicago
BECKWITH, Harry.
Selling the invisible : a field guide to modern marketing.
New York:
Warner Books,
1997.
Text.
Gaya MLA
BECKWITH, Harry.
Selling the invisible : a field guide to modern marketing.
New York:
Warner Books,
1997.
Text.
Gaya Turabian
BECKWITH, Harry.
Selling the invisible : a field guide to modern marketing.
New York:
Warner Books,
1997.
Print.