Gaya APA
Doyle, S, A, C.
(2019).
Lembah Ketakutan (The Valley of Fear)
.
Jakarta:
gramdia pusaka utama.
Gaya MLA
Doyle, Sir, Arthur, Conan.
"Lembah Ketakutan (The Valley of Fear)".
Jakarta:
gramdia pusaka utama,
2019.
[UMUM].