APA (7th ed.) Citation

Smart, P. (1989). The illustrated encyclopedia of the butterfly world.

Chicago Style (17th ed.) Citation

Smart, Paul. The Illustrated Encyclopedia of the Butterfly World. London :bSalamander Books, 1989.

MLA (9th ed.) Citation

Smart, Paul. The Illustrated Encyclopedia of the Butterfly World. 1989.

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