BibTeX:
@incollection{Various,
  author = {Various},
  title = {The Master sent a Tablet to a lady who longed ‘for the Heavenly Kingdom’},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/mornings},
}

APA:
Various. The Master sent a Tablet to a lady who longed ‘for the Heavenly Kingdom’. In *bahaistories.com archive*.

MLA:
Various. "The Master sent a Tablet to a lady who longed ‘for the Heavenly Kingdom’." *bahaistories.com archive*, n.d..

Chicago:
Various. "The Master sent a Tablet to a lady who longed ‘for the Heavenly Kingdom’." In *bahaistories.com archive*, n.d..