Abate, Frank R., ed. 1997. Oxford Pocket Dictionary and Thesaurus, editio Americana. Novi Eboraci: Oxford University Press. ISBN 0-19-513097-9.
Goldstein, Norm, ed. 2007. Associated Press Style Book. Novi Eboraci: Basic Books. ISBN 0-465-00489-X.
Beda. 731. Historia ecclesiastica gentis Anglorum.
Chicago Manual of Style, ed. 2a. 1993. Sicagi: University of Chicago. ISBN 0-226-10389-7.
Chicago Manual of Style, ed 16a. 2010. Sicagi: University of Chicago. ISBN 0-226-10420-6.
Blackburn, Bonnie, et Lanfranc Holford-Strevens. (1999) 2003. The Oxford companion to the Year: An exploration of calendar customs and time-reckoning. Oconiae: Oxford University Press. ISBN 0-19-214231-3.
Cunningham, Philip A., et Arthur F. Starr. 1998. Sharing Shalom: A Process for Local Interfaith Dialogue between Christians and Jews. Paulist Press. ISBN 0-8091-3835-2.
Declercq, Georges. 2000. Anno Domini: The origins of the Christian era. Turnhout Belgii: Brepols. ISBN 2-503-51050-7.
Declercq, Georges. 2002. Dionysius Exiguus and the Introduction of the Christian Era. Sacris Erudiri 41: 165–246.
Doggett. 1992. Calendars. In Explanatory supplement to the astronomical almanac, ed. P. Kenneth Seidelmann. Sausalito Californiae: University Science Books. ISBN 0-935702-68-7.
Patrick, J. 1908. General Chronology. In The Catholic Encyclopedia. Novi Eboraci: Robert Appleton Company.