APA

Kelly J., . (1986). The oxford dictionary of Popes. New York: Oxford University press.

Chicago

Kelly J.N.D, . 1986. The oxford dictionary of Popes. New York: Oxford University press.

Harvard

Kelly J., . (1986). The oxford dictionary of Popes. New York: Oxford University press.

MLA

Kelly J.N.D, . The oxford dictionary of Popes. New York: Oxford University press. 1986.