APA (7 ম সংস্করণ) উদ্ধৃতি

Gould, S. J. (1987). Time's arrow, time's cycle: Myth and metaphor in the discovery of geological time. Harvard University Press.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Gould, Stephen Jay. Time's Arrow, Time's Cycle: Myth and Metaphor in the Discovery of Geological Time. Cambridge, Mass.: Harvard University Press, 1987.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Gould, Stephen Jay. Time's Arrow, Time's Cycle: Myth and Metaphor in the Discovery of Geological Time. Harvard University Press, 1987.