Gaya APA
Ward, Barbara. (1979).
Progress for a Small Planet .
London:
Penguin Books.
Gaya Chicago
Ward, Barbara.
Progress for a Small Planet.
London:
Penguin Books,
1979.
Text.
Gaya MLA
Ward, Barbara.
Progress for a Small Planet.
London:
Penguin Books,
1979.
Text.
Gaya Turabian
Ward, Barbara.
Progress for a Small Planet.
London:
Penguin Books,
1979.
Print.