APA (7th ed.) Citation

Haeckel, E. (1912). Last words on evolution: A popular retrospect and summary. London: Watts & Co.

Chicago Style (17th ed.) Citation

Haeckel, Ernst. Last Words on Evolution: A Popular Retrospect and Summary. London: Watts & Co, 1912.

MLA (8th ed.) Citation

Haeckel, Ernst. Last Words on Evolution: A Popular Retrospect and Summary. London: Watts & Co, 1912.

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