- Bahá'u'lláh, Abdu'l-Bahá, Shoghi Effendi, Universal House of Justice. Helen Bassett Hornby, comp. Lights of Guidance: A Bahá'í Reference File (1988). — The classic Baha'i reference book. This is its first online edition.
- Khazeh Fananapazir. Sermon of the Gulf (Khutbih Tutunjiyyih): Introduction (2000). — Essay on Imam `Ali's sermon, which is also the source of Baha'u'llah's quote in Epistle to the Son o...
- Universal House of Justice. Station of Baha'u'llah: Three Letters (1991-1992). — Three letters on the station of Baha'u'llah, the souls of the Manifestations, the varying intensitie...
- Universal House of Justice. Station of Bahá'u'lláh and the Significance of His Revelation, The (1992-10-15). — As the soul is a mystery that the human mind cannot unravel, even more ineffable is the nature of th...
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