BibTeX:
@incollection{BahChronicleseditors,
  author = {Bahá'í Chronicles editors},
  title = {The Poet of Káshán Who Longed for Bahá'u'lláh},
  booktitle = {Bahá'í Chronicles},
  url = {https://bahaichronicles.org/mirza-mihdiy-i-kashani/},
}

APA:
Bahá'í Chronicles editors. The Poet of Káshán Who Longed for Bahá'u'lláh. In *Bahá'í Chronicles*.

MLA:
Bahá'í Chronicles editors. "The Poet of Káshán Who Longed for Bahá'u'lláh." *Bahá'í Chronicles*, n.d..

Chicago:
Bahá'í Chronicles editors. "The Poet of Káshán Who Longed for Bahá'u'lláh." In *Bahá'í Chronicles*, n.d..