APA (7th ed.) Citation

Buchsbaum, R. M. (1963). Animals without backbones: An introduction to the invertebrates (rev. ed., reprinted.). Penguin Books.

Chicago Style (17th ed.) Citation

Buchsbaum, Ralph Morris. Animals Without Backbones: An Introduction to the Invertebrates. rev. ed., reprinted. Harmondsworth [u.a.]: Penguin Books, 1963.

MLA (9th ed.) Citation

Buchsbaum, Ralph Morris. Animals Without Backbones: An Introduction to the Invertebrates. rev. ed., reprinted. Penguin Books, 1963.