Saya mau tau Abad ke-20: dari Kalender Romawi Timur

Barry Setterfield. Ancient Chronology in Scripture. September 1999.

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Prof. Dr. William Adler. Time Immemorial: Archaic History and its Sources in Christian Chronography from Julius Africanus to George Syncellus. Washington, D.C. : Dumbarton Oaks Research Library and Collection, 1989.

K.A. Worp. Chronological Observations on Later Byzantine Documents. 1985. University of Amsterdam.

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Rev. Philip Schaff (1819–1893), Ed. "Era." Schaff-Herzog Encyclopedia of Religious Knowledge New Edition, 13 Vols., 1908–14. Vol. 4, pp. 163.

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