APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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