APA (7th ed.) Citation

Buchsbaum, R. (1948). Animals without backbones : an introduction to the invertebrates / by R. Buchsbaum: An introduction to the invertebrates (Rev. ed.). Penguin Books.

Chicago Style (17th ed.) Citation

Buchsbaum, R. Animals Without Backbones : An Introduction to the Invertebrates / by R. Buchsbaum: An Introduction to the Invertebrates. Rev. ed. Penguin Books, 1948.

MLA (9th ed.) Citation

Buchsbaum, R. Animals Without Backbones : An Introduction to the Invertebrates / by R. Buchsbaum: An Introduction to the Invertebrates. Rev. ed. Penguin Books, 1948.

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