Piel, G. (1964). Science in the cause of man. New York: Vintage Books.
Trích dẫn kiểu ChicagoPiel, Gerard. Science in the Cause of Man. New York: Vintage Books, 1964.
MLA citiranjePiel, Gerard. Science in the Cause of Man. New York: Vintage Books, 1964.
Opozorilo: Ti citati niso vedno 100% točni.