APA

Prawer J., . (1972). The world of the Crusaders. New York: Quadrangle Books.

Chicago

Prawer Joshua, . 1972. The world of the Crusaders. New York: Quadrangle Books.

Harvard

Prawer J., . (1972). The world of the Crusaders. New York: Quadrangle Books.

MLA

Prawer Joshua, . The world of the Crusaders. New York: Quadrangle Books. 1972.