- 1998. Kitáb-i-Íqán, The Book of Certitude: Notes on paragraph numbering. Universal House of Justice, Research Department. — Official paragraph numbering.
- 1986. Page Conversion Tables of Kitab-i-Iqan, PDC, and SAQ. The Báb, Bahá'u'lláh, Abdu'l-Bahá, Shoghi Effendi, James Heggie, comp. . — Cross-reference between differently paginated versions of Kitab-i-Iqan, Promised Day is Come, and So...
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