Cita APA (7th ed.)

Bruchsbaum, R. M. 1. (1948). Animals without backones: An introduction to the invertebrates. Univ. of Chicago Press.

Cita Chicago (17th ed.)

Bruchsbaum, Ralph Morris 1907. Animals Without Backones: An Introduction to the Invertebrates. Chicago: Univ. of Chicago Press, 1948.

Cita MLA (9th ed.)

Bruchsbaum, Ralph Morris 1907. Animals Without Backones: An Introduction to the Invertebrates. Univ. of Chicago Press, 1948.