Cowles, V. (1956). Winston Churchill: The era and the man. New York: The Universal Library.
Trích dẫn kiểu ChicagoCowles, Virginia. Winston Churchill: The Era and the Man. New York: The Universal Library, 1956.
MLA引文Cowles, Virginia. Winston Churchill: The Era and the Man. New York: The Universal Library, 1956.
警告:这些引文格式不一定是100%准确.