APA (7th ed.) Citation

Foss, M. (1997). People of the first crusade (1. publ.). O'Mara Books.

Chicago Style (17th ed.) Citation

Foss, Michael. People of the First Crusade. 1. publ. London: O'Mara Books, 1997.

MLA (9th ed.) Citation

Foss, Michael. People of the First Crusade. 1. publ. O'Mara Books, 1997.

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