APA (7th ed.) Citation

De Beer, G. (1951). Embryos and ancestors (Rev. ed.). Clarendon Press.

Chicago Style (17th ed.) Citation

De Beer, Gavin. Embryos and Ancestors. Rev. ed. Oxford: Clarendon Press, 1951.

MLA (9th ed.) Citation

De Beer, Gavin. Embryos and Ancestors. Rev. ed. Clarendon Press, 1951.