Gaya APA
Allen, Robert. (1980).
How To Save The World .
London:
Kogan Page.
Gaya Chicago
Allen, Robert.
How To Save The World.
London:
Kogan Page,
1980.
Text.
Gaya MLA
Allen, Robert.
How To Save The World.
London:
Kogan Page,
1980.
Text.
Gaya Turabian
Allen, Robert.
How To Save The World.
London:
Kogan Page,
1980.
Print.