The Roman Martyrology. Transl. by the Archbishop of Baltimore. Last Edition, According to the Copy Printed at Rome in 1914. Revised Edition, with the Imprimatur of His Eminence Cardinal Gibbons. Baltimore: John Murphy Company, 1916. pp. 54-55.
Rev. Sabine Baring-Gould (M.A.). "S. Zacharias, Patr. of Jerusalem. (A.D. 631.)." In: The Lives of the Saints. Volume the Second: February. London: John C. Nimmo, 1897. pp. 359-360.
Rev. Sabine Baring-Gould (M.A.). "S. George of Amastris, B. C. (Beginning of 9th Cent.)." In: The Lives of the Saints. Volume the Second: February. London: John C. Nimmo, 1897. pp. 363-364.
Rev. Sabine Baring-Gould (M.A.). "B. Pepin of Landen, C. (A.D. 646.)." In: The Lives of the Saints. Volume the Second: February. London: John C. Nimmo, 1897. pp. 360-361.
Rev. Sabine Baring-Gould (M.A.). "SS. German, Ab., and Randoald, Prior, MM. (End of 7th Cent.)." In: The Lives of the Saints. Volume the Second: February. London: John C. Nimmo, 1897. pp. 361-363.
ecclesia.gr
(in Greek) Συναξαριστής. 21 Φεβρουαρίου. Ecclesia.gr. (H Εκκλησια τησ Ελλαδοσ).
holytrinityorthodox.com
March 6 / February 21. Holy Trinity Russian Orthodox Church (A parish of the Patriarchate of Moscow).
