BibTeX:
@incollection{Various,
  author = {Various},
  title = {Little by Little},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/striving},
}

APA:
Various. Little by Little. In *bahaistories.com archive*.

MLA:
Various. "Little by Little." *bahaistories.com archive*, n.d..

Chicago:
Various. "Little by Little." In *bahaistories.com archive*, n.d..