BibTeX:
@incollection{Various,
  author = {Various},
  title = {On ‘Abdu’l-Bahá's birthday, 23 May, over 100 guests were at Francis Breeds home},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/birthday},
}

APA:
Various. On ‘Abdu’l-Bahá's birthday, 23 May, over 100 guests were at Francis Breeds home. In *bahaistories.com archive*.

MLA:
Various. "On ‘Abdu’l-Bahá's birthday, 23 May, over 100 guests were at Francis Breeds home." *bahaistories.com archive*, n.d..

Chicago:
Various. "On ‘Abdu’l-Bahá's birthday, 23 May, over 100 guests were at Francis Breeds home." In *bahaistories.com archive*, n.d..