Beard, C. A. (1940). A foreign policy for America. New York: Alfred A. Knopf.
Trích dẫn kiểu ChicagoBeard, Charles A. A Foreign Policy for America. New York: Alfred A. Knopf, 1940.
MLA引文Beard, Charles A. A Foreign Policy for America. New York: Alfred A. Knopf, 1940.
警告：这些引文格式不一定是100％准确.