APA (7th ed.) Citation

Brooke, M., & Birkhead, T. R. (1991). The Cambridge encyclopedia of ornithology. Cambridge University Press.

Chicago Style (17th ed.) Citation

Brooke, Michael, and T. R. Birkhead. The Cambridge Encyclopedia of Ornithology. Cambridge: Cambridge University Press, 1991.

MLA (9th ed.) Citation

Brooke, Michael, and T. R. Birkhead. The Cambridge Encyclopedia of Ornithology. Cambridge University Press, 1991.