APA
Lewis C. S., . (1976). The problem of pain. New York: Macmillan Publishing Co.
Chicago
Lewis C S, . 1976. The problem of pain. New York: Macmillan Publishing Co.
Harvard
Lewis C. S., . (1976). The problem of pain. New York: Macmillan Publishing Co.
MLA
Lewis C S, . The problem of pain. New York: Macmillan Publishing Co. 1976.
