BibTeX:
@incollection{CarolRutsteinJuneRemignantiandMaryLouiseSuhm1976,
  author = {Carol Rutstein, June Remignanti and Mary Louise Suhm},
  title = {One Hundred Electric Lamps},
  booktitle = {The Bahá'í World, vol. 15, In Memoriam: Curtis DeMude Kelsey},
  year = {1976},
  publisher = {Bahá'í World Centre},
  pages = {468-473},
  url = {https://bahai-library.com/pdf/bw/memoriam_bw_15.pdf},
}

APA:
Carol Rutstein, June Remignanti and Mary Louise Suhm. (1976). One Hundred Electric Lamps. In *The Bahá'í World, vol. 15, In Memoriam: Curtis DeMude Kelsey* (p. 468-473). Bahá'í World Centre.

MLA:
Carol Rutstein, June Remignanti and Mary Louise Suhm. "One Hundred Electric Lamps." *The Bahá'í World, vol. 15, In Memoriam: Curtis DeMude Kelsey*, Bahá'í World Centre, 1976, p. 468-473.

Chicago:
Carol Rutstein, June Remignanti and Mary Louise Suhm. "One Hundred Electric Lamps." In *The Bahá'í World, vol. 15, In Memoriam: Curtis DeMude Kelsey*, 468-473. Bahá'í World Centre, 1976.