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