Gaya APA
Showers, victor. (1979).
World Facts and figures .
New York:
John Wiley & Sons, Inc.
Gaya Chicago
Showers, victor.
World Facts and figures.
New York:
John Wiley & Sons, Inc,
1979.
Text.
Gaya MLA
Showers, victor.
World Facts and figures.
New York:
John Wiley & Sons, Inc,
1979.
Text.
Gaya Turabian
Showers, victor.
World Facts and figures.
New York:
John Wiley & Sons, Inc,
1979.
Print.