APA Style

Lewis, C, S., Hague, M. (1981). The pilgrim's regress : an allegorical apology for Christianity, reason, and romanticism . Grand Rapids, Michigan: William B. Eerdmans Publishing Co..

MLA Style

Lewis, C., S.., Hague, M.. "The pilgrim's regress : an allegorical apology for Christianity, reason, and romanticism". Grand Rapids, Michigan: William B. Eerdmans Publishing Co., 1981. Text.