APA (7th ed.) Citation

Midgley, M. (1983). Animals and why they matter. Penguin Books.

Chicago Style (17th ed.) Citation

Midgley, Mary. Animals and Why They Matter. Harmondsworth, Middlesex ; New York, N.Y.: Penguin Books, 1983.

MLA (9th ed.) Citation

Midgley, Mary. Animals and Why They Matter. Penguin Books, 1983.