Gaya APA
Lewis, C.
(1978).
The problem of pain, [impr.ed.]. Cet.pertama 1957.
.
Collins:
Fount Paperbacks.
Gaya MLA
Lewis, C.S..
"The problem of pain, [impr.ed.]. Cet.pertama 1957. ".
Collins:
Fount Paperbacks,
1978.
Buku.