Παραπομπή APA

Richards, E. (1998). Mapping time: The calender and its history. Oxford University.

Παραπομπή Chicago Style

Richards, E.G. Mapping Time: The Calender and Its History. New York: Oxford University, 1998.

Παραπομπή MLA

Richards, E.G. Mapping Time: The Calender and Its History. Oxford University, 1998.