O'Neil, B. H. S. J. (1960). Castles and cannon: A study of early artillery fortifications in England. Clarendon Press.
芝加哥风格引文O'Neil, B. H. St. J. Castles and Cannon: A Study of Early Artillery Fortifications in England. Oxford: Clarendon Press, 1960.
MLA引文O'Neil, B. H. St. J. Castles and Cannon: A Study of Early Artillery Fortifications in England. Clarendon Press, 1960.
警告：这些引文格式不一定是100％准确.