- Brittingham, Isabella, by Robert Stockman (1995).
- Letter to Grace Holley, by Abdu'l-Bahá Shoghi Effendi, trans. (1919-01-28). — Short message of greeting and praise.
- Letter to Isabella Brittingham on Reincarnation and Return, by Edward C. Getsinger (1916-04-16). — A letter written by Getsinger read before the Washington D.C., Baha’i Assembly, April 16, 1916, to...
- Promoting Peace: 100 Years of the Baha'i Faith in Santa Paula, California, 1914-2014, by Anne King Sadeghpour (2017). — Detailed history of the community in southern California, including references to Marzieh Gail, Ethe...
- Revelation of Bahaullah in a Sequence of Four Lessons, The, Isabella D. Brittingham, comp. (1902-02). — One of the earliest English-language histories of the Faith, written to prove the truth of Baha'u'll...
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