Crawford, M., & Marsh, D. (1989). The driving force: Food, evolution, and the future (1st U.S. ed.). Harper & Row.
Chicago-viite (17. p.)Crawford, Michael, ja David Marsh. The Driving Force: Food, Evolution, and the Future. 1st U.S. ed. New York: Harper & Row, 1989.
MLA-viite (8. p.)Crawford, Michael, ja David Marsh. The Driving Force: Food, Evolution, and the Future. 1st U.S. ed. Harper & Row, 1989.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.