APA Style
C.S., L.
(2006).
Surat-surat Screwtape = The Screwtape Letters
(
4th ed.)
.
Bandung:
Pionir Jaya.
MLA Style
C.S., Lewis-.
"Surat-surat Screwtape = The Screwtape Letters".
4th ed.
Bandung:
Pionir Jaya,
2006.
Paperback.