The crusades;
the story of the Latin kingdom of Jerusalem,
by T.A. Archer and Charles Lethbridge Kingsford.

APA Citation

Archer, T. Andrew., Kingsford, C. Lethbridge. (19191894). The crusades: the story of the Latin kingdom of Jerusalem. London: T. Fisher Unwin.

MLA Citation

Archer, Thomas Andrew, and Charles Lethbridge Kingsford. The Crusades: the Story of the Latin Kingdom of Jerusalem. London: T. Fisher Unwin, 19191894.

Warning: These citations may not always be complete (especially for serials).