Koestler, A., & Butterfield, H. (1964). The Sleepwalkers: A history of man's changing vision of the universe; with an introduction by Herbert Butterfield. Penguin.
Citação norma ChicagoKoestler, Arthur, and Herbert Butterfield. The Sleepwalkers: A History of Man's Changing Vision of the Universe; with an Introduction by Herbert Butterfield. London: Penguin, 1964.
Citação norma MLAKoestler, Arthur, and Herbert Butterfield. The Sleepwalkers: A History of Man's Changing Vision of the Universe; with an Introduction by Herbert Butterfield. Penguin, 1964.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.