BibTeX:
@incollection{Various,
  author = {Various},
  title = {Stanwood Cobb recorded that ‘the most important interview’ he had},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/spiritual-life},
}

APA:
Various. Stanwood Cobb recorded that ‘the most important interview’ he had. In *bahaistories.com archive*.

MLA:
Various. "Stanwood Cobb recorded that ‘the most important interview’ he had." *bahaistories.com archive*, n.d..

Chicago:
Various. "Stanwood Cobb recorded that ‘the most important interview’ he had." In *bahaistories.com archive*, n.d..