Jabarkan Perkiraan tarikh dari Codex Washingtonianus

Naskah ini diperkirakan oleh INTF berasal dari abad ke-4 atau ke-5.

Henry A. Sanders, Facsimile of the Washington Manuscript of the Four Gospels in the Freer Collection, The University of Michigan, Ann Arbor, Michigan 1912.

Henry A. Sanders, The New Testament Manuscripts in the Freer Collection, The Macmillan Company, New York – London 1918.

Frederic G. Kenyon, Our Bible and the Ancient Manuscripts, (4th ed.), London 1939.

Larry W. Hurtado, Text-Critical Methodology and the Pre-Caesarean Text: Codex W in the Gospel of Mark, Studies and Documents 43, Eerdmans 1981.

Larry W. Hurtado, The Freer Biblical Manuscripts. Fresh Studies of an American Treasure Trove, Brill 2007.