Crawford, M., & Marsh, D. (1989). The driving force: Food, evolution, and the future (1st U.S. ed.). Harper & Row.
Lua i Stíl Chicago (17ú heag.)Crawford, Michael, agus David Marsh. The Driving Force: Food, Evolution, and the Future. 1st U.S. ed. New York: Harper & Row, 1989.
Lua MLA (8ú heag.)Crawford, Michael, agus David Marsh. The Driving Force: Food, Evolution, and the Future. 1st U.S. ed. Harper & Row, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.