BibTeX:
@incollection{Various,
  author = {Various},
  title = {In the days when steamships, such as the Mauritania and Franconia, made…},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/teaching},
}

APA:
Various. In the days when steamships, such as the Mauritania and Franconia, made…. In *bahaistories.com archive*.

MLA:
Various. "In the days when steamships, such as the Mauritania and Franconia, made…." *bahaistories.com archive*, n.d..

Chicago:
Various. "In the days when steamships, such as the Mauritania and Franconia, made…." In *bahaistories.com archive*, n.d..