BibTeX:
@incollection{BahChronicleseditors,
  author = {Bahá'í Chronicles editors},
  title = {Hippolyte Dreyfus, the First French Bahá'í},
  booktitle = {Bahá'í Chronicles},
  url = {https://bahaichronicles.org/hippolyte-dreyfus-barney/},
}

APA:
Bahá'í Chronicles editors. Hippolyte Dreyfus, the First French Bahá'í. In *Bahá'í Chronicles*.

MLA:
Bahá'í Chronicles editors. "Hippolyte Dreyfus, the First French Bahá'í." *Bahá'í Chronicles*, n.d..

Chicago:
Bahá'í Chronicles editors. "Hippolyte Dreyfus, the First French Bahá'í." In *Bahá'í Chronicles*, n.d..