APA (7th ed.) Citation

(1995). The heavens: The World Book Encyclopedia of Science. World Book, Inc.

Chicago Style (17th ed.) Citation

The Heavens: The World Book Encyclopedia of Science. World Book, Inc, 1995.

MLA (8th ed.) Citation

The Heavens: The World Book Encyclopedia of Science. World Book, Inc, 1995.

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