Callista : a sketch of the third century,

MLA

Newman, John Henry. Callista : a Sketch of the Third Century. New York: Sheed & Ward, 1941.

APA

Newman, J. Henry. (1941). Callista : a sketch of the third century. New York: Sheed & Ward.

Chicago

Newman, John Henry, Callista: A Sketch of the Third Century,. New York: Sheed & Ward, 1941.