Ponting, C. (1993). A green history of the world: The environment and the collapse of great civilizations. New York: Penguin Books.
Styl ChicagoPonting, Clive. A Green History of the World: The Environment and the Collapse of Great Civilizations. New York: Penguin Books, 1993.
Citace podle MLAPonting, Clive. A Green History of the World: The Environment and the Collapse of Great Civilizations. New York: Penguin Books, 1993.
Upozornění: Tyto citace jsou generovány automaticky. Nemusí být zcela správně podle citačních pravidel..