Gaya APA

Koestler, A. (-1956). Darkness at noon, transl.by D.Hardy, (8th pr.). -- Signet books, S 1220. Penerbitan asli 1941. . (New York): The new American library.

Gaya MLA

Koestler, A.(1915-1983).. "Darkness at noon, transl.by D.Hardy, (8th pr.). -- Signet books, S 1220. Penerbitan asli 1941. ". (New York): The new American library, -1956. Buku.