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