APA (7th ed.) Citation

Osborn, F. (1951). Preface to eugenics (Rev. ed.). Harper.

Chicago Style (17th ed.) Citation

Osborn, Frederick. Preface to Eugenics. Rev. ed. New York: Harper, 1951.

MLA (8th ed.) Citation

Osborn, Frederick. Preface to Eugenics. Rev. ed. Harper, 1951.