APA (7th ed.) Citation

Smart, P. (1985). The illustrated encyclopedia of the butterfly world. Leisure Books.

Chicago Style (17th ed.) Citation

Smart, Paul. The Illustrated Encyclopedia of the Butterfly World. [s.l.]: Leisure Books, 1985.

MLA (9th ed.) Citation

Smart, Paul. The Illustrated Encyclopedia of the Butterfly World. Leisure Books, 1985.

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