APA

Lewis C. S., . (19591961). The screwtape letters & Screwtape proposes a toast. New York: Time, Inc.

Chicago

Lewis C S, . 19591961. The screwtape letters & Screwtape proposes a toast. New York: Time, Inc.

Harvard

Lewis C. S., . (19591961). The screwtape letters & Screwtape proposes a toast. New York: Time, Inc.

MLA

Lewis C S, . The screwtape letters & Screwtape proposes a toast. New York: Time, Inc. 19591961.