APA
Lewis C., . (1940). The problem of pain. London: Geoffrey Bles ; The Centenary Press.
Chicago
Lewis C.S, . 1940. The problem of pain. London: Geoffrey Bles ; The Centenary Press.
Harvard
Lewis C., . (1940). The problem of pain. London: Geoffrey Bles ; The Centenary Press.
MLA
Lewis C.S, . The problem of pain. London: Geoffrey Bles ; The Centenary Press. 1940.
