APA Style
Beckwith, Harry. (1997).
Selling the invisible .
USA:
Time Warner.
Chicago Style
Beckwith, Harry.
Selling the invisible.
USA:
Time Warner,
1997.
Text.
MLA Style
Beckwith, Harry.
Selling the invisible.
USA:
Time Warner,
1997.
Text.
Turabian Style
Beckwith, Harry.
Selling the invisible.
USA:
Time Warner,
1997.
Print.