Ardrey, R. (1958). Shadow of heroes. London: Collins.
Trích dẫn kiểu ChicagoArdrey, Robert. Shadow of Heroes. London: Collins, 1958.
MLA引文Ardrey, Robert. Shadow of Heroes. London: Collins, 1958.
警告：这些引文格式不一定是100％准确.
APA引文
Ardrey, R. (1958). Shadow of heroes. London: Collins.
Trích dẫn kiểu ChicagoArdrey, Robert. Shadow of Heroes. London: Collins, 1958.
MLA引文Ardrey, Robert. Shadow of Heroes. London: Collins, 1958.