BibTeX:
@incollection{Various,
  author = {Various},
  title = {Rúhá Khánum, one of ‘Abdu'l-Bahá's daughters, was seriously ill when He left Alexandria…},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2014/11/ruha-khanum-one-of-abdul-bahas.html},
}

APA:
Various. Rúhá Khánum, one of ‘Abdu'l-Bahá's daughters, was seriously ill when He left Alexandria…. In *Baha'i Stories Blog*.

MLA:
Various. "Rúhá Khánum, one of ‘Abdu'l-Bahá's daughters, was seriously ill when He left Alexandria…." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "Rúhá Khánum, one of ‘Abdu'l-Bahá's daughters, was seriously ill when He left Alexandria…." In *Baha'i Stories Blog*, n.d..