- Richard Francis. Arden Lee, ed. Billie Marie (Tuttle) Brackett (2003). — Tuttle Brackett (1921-2000) was an American Baha'i from Reno, Nevada and niece of Hand of the Cause ...
- Bill Washington. Hands of the Cause of God: Personal Recollections (2014). — Recollections of A.Q. Faizi, A.A. Furútan, Clara Dunn, Rúhiyyih Khanum, Ugo Giachery, Leroy Ioas, ...
- Robert Weinberg. Leroy Ioas, Hand of the Cause of God, by Anita Ioas Chapman, and Lua Getsinger, Herald of the Covenant, by Velda Piff Metelmann: Reviews (1999).
- Universal House of Justice. Geoffrey W. Marks, comp. Messages from the Universal House of Justice 1963-1986: Third Epoch of the Formative Age (1996).
- Kathryn Jewett Hogenson. The Cause of Universal Peace: 'Abdu'l-Bahá's Enduring Impact (2021-02-23). — On Abdu'l-Baha's interest in the Lake Mohonk Conferences on International Arbitration in New York, 1...
- Emma Maxie Jones, Author unknown. Third Bahá'í Intercontinental Conference, Chicago: Notes (1958-05). — Notes, with comments by Borah Kavelin, Rúhiyyih Khanum, Leroy Ioas, Horace Holley, John Robarts, Ug...
- Jack Boyd, Bill Washington. Faruq Izadinia, trans. یادی از حارسان مدنیت الهیّه خاطراتی از ایادیان امرالله جک بوید بیل واشنگتون (Recollections of the Hands of the Cause Jack Boyd and Bill Washington) (2024). — Persian translation of the short essays in "Memories of Hands of the Cause of God" by Jack Boyd and ...
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