- Ages and Cycles, by Moojan Momen (1995). — Overview of the ideas of specific cycles and periods of time in Baha'i belief.
- Explanation of a Zoroastrian Prophecy: Length of the "Bahá'í Cycle", by Karl Weaver (2017). — Review of certain concepts in Judaism, Christianity, Islam, ancient astrology, and modern astronomic...
- Ridván 1964: Bahá'í Era 121, by Universal House of Justice (1964). — Annual message to the Baha'is of the world.
- Tablet to Hasan-i-Sháhábadí (Lawh-i-Hasan-i-Sháhábadí), by Bahá'u'lláh Khazeh Fananapazir, trans. (2002-02-14). — A tablet from the Akka period, addressed to a certain Hasan living in Shahabad of Arak in central Ir...
- Universal Cycles, The, by Abdu'l-Bahá, Shoghi Effendi, Universal House of Justice Iscander Micael Tinto, comp. (2013). — Lengthy compilation on the cycles of time and eras in the world of existence, and stages of Baha'i d...
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