BibTeX:
@incollection{Various,
  author = {Various},
  title = {How one of ‘Abdu’l-Baha’s translators became fluent in Arabic – without studying it},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2018/11/how-one-of-abdul-bahas-translators.html},
}

APA:
Various. How one of ‘Abdu’l-Baha’s translators became fluent in Arabic – without studying it. In *Baha'i Stories Blog*.

MLA:
Various. "How one of ‘Abdu’l-Baha’s translators became fluent in Arabic – without studying it." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "How one of ‘Abdu’l-Baha’s translators became fluent in Arabic – without studying it." In *Baha'i Stories Blog*, n.d..