APA (7th ed.) Citation

Reader's Digest Association. (1980). Book of natural wonders. Reader's Digest Association.

Chicago Style (17th ed.) Citation

Reader's Digest Association. Book of Natural Wonders. Pleasantville, N.Y. ; Montreal: Reader's Digest Association, 1980.

MLA (8th ed.) Citation

Reader's Digest Association. Book of Natural Wonders. Reader's Digest Association, 1980.

Warning: These citations may not always be 100% accurate.