Cita APA

Gregor, A. S. (1974). Man's mark on the land: The changing environment from the Stone Age to the Age of Smog, Sewage, and Tar Feet. New York: Soribner.

Citación estilo Chicago

Gregor, Arthur S. Man's Mark On the Land: The Changing Environment From the Stone Age to the Age of Smog, Sewage, and Tar Feet. New York: Soribner, 1974.

Cita MLA

Gregor, Arthur S. Man's Mark On the Land: The Changing Environment From the Stone Age to the Age of Smog, Sewage, and Tar Feet. New York: Soribner, 1974.