APA (7th ed.) Citation

Huxley, J. (1939). Essays of a Biologist. Penguin Books.

Chicago Style (17th ed.) Citation

Huxley, Julian. Essays of a Biologist. Harmondsworth: Penguin Books, 1939.

MLA (8th ed.) Citation

Huxley, Julian. Essays of a Biologist. Penguin Books, 1939.

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