BibTeX:
@incollection{Various,
  author = {Various},
  title = {I remember the Guardian telling me of how (I believe it must have been in early},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/efficiency},
}

APA:
Various. I remember the Guardian telling me of how (I believe it must have been in early. In *bahaistories.com archive*.

MLA:
Various. "I remember the Guardian telling me of how (I believe it must have been in early." *bahaistories.com archive*, n.d..

Chicago:
Various. "I remember the Guardian telling me of how (I believe it must have been in early." In *bahaistories.com archive*, n.d..