Cita APA

(1980). Reader's digest book of natural wonders. New York: The Reader's Digest Association.

Chicago Style Citation

Reader's Digest Book of Natural Wonders. New York: The Reader's Digest Association, 1980.

Cita MLA

Reader's Digest Book of Natural Wonders. New York: The Reader's Digest Association, 1980.

Atenció: Aquestes cites poden no estar 100% correctes.