Trisagion (English Wikipedia)

"Sunday, June 19, 2016". All Saints Orthodox Christian Church. 17 June 2016. Archived from the original on 7 January 2017. Retrieved 6 January 2017.

antiochian.org

Geoffrey Greatrex (15 March 2011). The Chronicle of Pseudo-Zachariah Rhetor: Church and War in Late Antiquity. Liverpool University Press. pp. 254, 265–266. ISBN 978-1-84631-493-3.
Pseudo-Dionysius of Tel-Mahre: Chronicle. Liverpool University Press. 1 January 1997. pp. 7–9. ISBN 978-0-85323-760-0. Retrieved 26 September 2012.

Salmond, S. D. F. "John of Damascus: Exposition of the Orthodox Faith, Book III, Chapter X.—Concerning the Trisagium". In Philip Schaff (ed.). Hilary of Poitiers, John of Damascus. Vol. 2–09. pp. 53b–54. Retrieved 27 September 2012. {{cite book}}: |work= ignored (help)
Percival, Henry R. "The Canons of the Council in Trullo, Canon LXXXI". In Philip Schaff (ed.). The Seven Ecumenical Councils. Vol. 2–14. pp. 400–401. Retrieved 27 September 2012. {{cite book}}: |work= ignored (help)

"The Order for The Burial of the Dead". Book of Common Prayer (1662). Church of England. Retrieved 4 April 2023.

Armentrout, Don S.; Slocum, Robert Boak. "Trisagion". An Episcopal Dictionary of the Church. The Episcopal Church (US). Retrieved 4 April 2023.

"Adoration of the Precious and Life-Giving Cross". www.saintjosephorthodox.org. Retrieved 6 January 2017.

"Liturgy of St John Chrysostom". St George Antiochian Orthodox Church. Archived from the original on 2 June 2023. Retrieved 19 November 2019.

"a Note on the Translation of the Trisagion" (PDF). Archived from the original on 14 April 2016. Retrieved 11 March 2014.{{cite web}}: CS1 maint: bot: original URL status unknown (link)
"Liturgy of St John Chrysostom". St George Antiochian Orthodox Church. Archived from the original on 2 June 2023. Retrieved 19 November 2019.
"Sunday, June 19, 2016". All Saints Orthodox Christian Church. 17 June 2016. Archived from the original on 7 January 2017. Retrieved 6 January 2017.