APA-ийн эшлэл(7 дахь хэвлэлт)

Koestler, A., & Butterfield, H. (1964). The Sleepwalkers: A history of man's changing vision of the universe; with an introduction by Herbert Butterfield. Penguin.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Koestler, Arthur, ба Herbert Butterfield. The Sleepwalkers: A History of Man's Changing Vision of the Universe; with an Introduction by Herbert Butterfield. London: Penguin, 1964.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Koestler, Arthur, ба Herbert Butterfield. The Sleepwalkers: A History of Man's Changing Vision of the Universe; with an Introduction by Herbert Butterfield. Penguin, 1964.