BibTeX:
@incollection{Various,
  author = {Various},
  title = {‘Abdu’l-Bahá Recounts the Day at Badasht},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2018/12/tahirih-proclaims-day-of-resurrection.html},
}

APA:
Various. ‘Abdu’l-Bahá Recounts the Day at Badasht. In *Baha'i Stories Blog*.

MLA:
Various. "‘Abdu’l-Bahá Recounts the Day at Badasht." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "‘Abdu’l-Bahá Recounts the Day at Badasht." In *Baha'i Stories Blog*, n.d..