APA

Lewis C., . (1962). The screwtape letters. New York: The Macmillan Company.

Chicago

Lewis C.S, . 1962. The screwtape letters. New York: The Macmillan Company.

Harvard

Lewis C., . (1962). The screwtape letters. New York: The Macmillan Company.

MLA

Lewis C.S, . The screwtape letters. New York: The Macmillan Company. 1962.