APA (7th ed.) Citation

Clark, F. L. G., & Pirie, N. W. (1951). Four thousand million mouths; scientific humanism and the shadow of world hunger. Oxford University Press.

Chicago Style (17th ed.) Citation

Clark, Frederick Le Gros, and N. W. Pirie. Four Thousand Million Mouths; Scientific Humanism and the Shadow of World Hunger. London, New York: Oxford University Press, 1951.

MLA (9th ed.) Citation

Clark, Frederick Le Gros, and N. W. Pirie. Four Thousand Million Mouths; Scientific Humanism and the Shadow of World Hunger. Oxford University Press, 1951.