Cita APA (7a ed.)

Cox, G. W. (1891). The crusades (9th ed.). Longmans, Green, and co..

Cita Chicago Style (17a ed.)

Cox, George W. The Crusades. 9th ed. London ; New York: Longmans, Green, and co., 1891.

Cita MLA (8a ed.)

Cox, George W. The Crusades. 9th ed. Longmans, Green, and co., 1891.