APA (7th ed.) Citation

O'Neil, B. H. S. J. (1960). Castles and cannon: A study of early artillery fortifications in England. Clarendon Press.

Chicago Style (17th ed.) Citation

O'Neil, B. H. St. J. Castles and Cannon: A Study of Early Artillery Fortifications in England. Oxford: Clarendon Press, 1960.

MLA (8th ed.) Citation

O'Neil, B. H. St. J. Castles and Cannon: A Study of Early Artillery Fortifications in England. Clarendon Press, 1960.