Παραπομπή APA

Ifrah, G., & Bellos, D. [. e. a. (1981). Universal history of numbers: From prehistory to the invention of the computer. The Harvill Press.

Παραπομπή Chicago Style

Ifrah, Georges, και David [... et al] Bellos. Universal History of Numbers: From Prehistory to the Invention of the Computer. London: The Harvill Press, 1981.

Παραπομπή MLA

Ifrah, Georges, και David [... et al] Bellos. Universal History of Numbers: From Prehistory to the Invention of the Computer. The Harvill Press, 1981.