APA (7th ed.) Citation

Lewis, H. L. (1974). Butterflies of the world. Harrap.

Chicago Style (17th ed.) Citation

Lewis, H. L. Butterflies of the World. London: Harrap, 1974.

MLA (9th ed.) Citation

Lewis, H. L. Butterflies of the World. Harrap, 1974.

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