BibTeX:
@incollection{Various,
  author = {Various},
  title = {California Waits for the Master},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/planning},
}

APA:
Various. California Waits for the Master. In *bahaistories.com archive*.

MLA:
Various. "California Waits for the Master." *bahaistories.com archive*, n.d..

Chicago:
Various. "California Waits for the Master." In *bahaistories.com archive*, n.d..