APA (7th ed.) Citation

Fredregill, E. J. (1970). 1000 years: A Julian/Gregorian perpetual calendar, A.D. 1100 to A.D. 2099 ([1st ed.].). Exposition Press.

Chicago Style (17th ed.) Citation

Fredregill, Ernest J. 1000 Years: A Julian/Gregorian Perpetual Calendar, A.D. 1100 to A.D. 2099. [1st ed.]. New York: Exposition Press, 1970.

MLA (9th ed.) Citation

Fredregill, Ernest J. 1000 Years: A Julian/Gregorian Perpetual Calendar, A.D. 1100 to A.D. 2099. [1st ed.]. Exposition Press, 1970.