APA (7th ed.) Citation

Richards, E. G. (1999). Mapping time: The calendar and its history. Oxford University Press.

Chicago Style (17th ed.) Citation

Richards, E. G. Mapping Time: The Calendar and Its History. New York: Oxford University Press, 1999.

MLA (9th ed.) Citation

Richards, E. G. Mapping Time: The Calendar and Its History. Oxford University Press, 1999.