APA (7th ed.) Citation

Ehrlich, P. R., Holm, R. W., & Raven, P. H. (1969). Papers on evolution. Little Brown.

Chicago Style (17th ed.) Citation

Ehrlich, Paul R., Richard W. Holm, and Peter H. Raven. Papers on Evolution. Boston: Little Brown, 1969.

MLA (9th ed.) Citation

Ehrlich, Paul R., et al. Papers on Evolution. Little Brown, 1969.