APA (7th ed.) Citation

Duffy, C. (1979). Siege warfare : the fortress in the early modern world 1494-1660 / [by]Christopher Duffy: The fortress in the early modern world 1494-1660. Routledge and Kegan Paul.

Chicago Style (17th ed.) Citation

Duffy, Christopher. Siege Warfare : The Fortress in the Early Modern World 1494-1660 / [by]Christopher Duffy: The Fortress in the Early Modern World 1494-1660. London (etc.): Routledge and Kegan Paul, 1979.

MLA (9th ed.) Citation

Duffy, Christopher. Siege Warfare : The Fortress in the Early Modern World 1494-1660 / [by]Christopher Duffy: The Fortress in the Early Modern World 1494-1660. Routledge and Kegan Paul, 1979.

Warning: These citations may not always be 100% accurate.