APA (7th ed.) Citation

JONES, T., & GREIRD, A. (1994). Crusades. Penguin Books.

Chicago Style (17th ed.) Citation

JONES, Terry, and Alan GREIRD. Crusades. Penguin Books, 1994.

MLA (8th ed.) Citation

JONES, Terry, and Alan GREIRD. Crusades. Penguin Books, 1994.

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