APA (7th ed.) Citation

Wellnhofer,Peter,Dr. (1991). The Illustrated Encyclopedia of Pterosaurs. Crescent Books.

Chicago Style (17th ed.) Citation

Wellnhofer,Peter,Dr. The Illustrated Encyclopedia of Pterosaurs. New York: Crescent Books, 1991.

MLA (9th ed.) Citation

Wellnhofer,Peter,Dr. The Illustrated Encyclopedia of Pterosaurs. Crescent Books, 1991.

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