BibTeX:
@incollection{BahChronicleseditors,
  author = {Bahá'í Chronicles editors},
  title = {Father Dunn: The Spiritual Conqueror of a Continent},
  booktitle = {Bahá'í Chronicles},
  url = {https://bahaichronicles.org/},
}

APA:
Bahá'í Chronicles editors. Father Dunn: The Spiritual Conqueror of a Continent. In *Bahá'í Chronicles*.

MLA:
Bahá'í Chronicles editors. "Father Dunn: The Spiritual Conqueror of a Continent." *Bahá'í Chronicles*, n.d..

Chicago:
Bahá'í Chronicles editors. "Father Dunn: The Spiritual Conqueror of a Continent." In *Bahá'í Chronicles*, n.d..