Cita APA

Ehrlich, P. R. (1971). How to be a survivor: A plan to save spaceship earth. New York: Ballantine Books.

Chicago Style Citation

Ehrlich, Paul R. How to Be a Survivor: A Plan to Save Spaceship Earth. New York: Ballantine Books, 1971.

Cita MLA

Ehrlich, Paul R. How to Be a Survivor: A Plan to Save Spaceship Earth. New York: Ballantine Books, 1971.

Atenció: Aquestes cites poden no estar 100% correctes.