APA (7th ed.) Citation

Devries, K., Dickie, I., Dougherty, M. J., Jestice, P. G., Jorgensen, C., & Pavkovic, M. F. (2019). Battles of the crusades 1097-1444: From Dorylaeum to Varna. Amber Books.

Chicago Style (17th ed.) Citation

Devries, Kelly, Iain Dickie, Martin J. Dougherty, Phyllis G. Jestice, Christer Jorgensen, and Michael F. Pavkovic. Battles of the Crusades 1097-1444: From Dorylaeum to Varna. London: Amber Books, 2019.

MLA (9th ed.) Citation

Devries, Kelly, et al. Battles of the Crusades 1097-1444: From Dorylaeum to Varna. Amber Books, 2019.

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