APA (7th ed.) Citation

Krull, K., & Kulikov, B.. (2015). Charles Darwin. Puffin Books.

Chicago Style (17th ed.) Citation

Krull, Kathleen, and Boris Kulikov. Charles Darwin. New York: Puffin Books, 2015.

MLA (9th ed.) Citation

Krull, Kathleen, and Boris Kulikov. Charles Darwin. Puffin Books, 2015.

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