Jelaskan Abad ke-19 dan sebelumnya: dari Kalender Romawi Timur

John McClintock, James Strong. Cyclopedia of Biblical, theological, and ecclesiastical literature: Supplement. V.2. Harper, 1887.

Prof. Fr. Arsenius John Baptist Vuibert (S.S.). An Ancient History: From the Creation to the Fall of the Western Empire in A.D. 476. Baltimore: Foley, 1886.

Samuel Poznański. "Ben Meir and the Origin of the Jewish Calendar". in The Jewish Quarterly Review, Vol. 10, No. 1 (Oct., 1897), pp. 152–161.

Sir Thomas Browne. Pseudodoxia Epidemica: Book VI. Ch. 1 – Of sundry common opinions Cosmographical and Historical. 1646; 6th ed., 1672. pp. 321–330.

The Popular Encyclopedia: being a general dictionary of arts, sciences, literature, biography, history, and political economy. (Vol. 3, Part 1). Glasgow: Blackie and Son, 1841.

Thomas Spencer Baynes. "Chronology: Era of the Creation of the World.” The Encyclopædia Britannica: a dictionary of arts, sciences, and general literature''. 9th Ed., Vol. 5. A. & C. Black, 1833. pp. 709–754.