BibTeX:
@incollection{BeatriceAshton1974,
  author = {Beatrice Ashton},
  title = {Six Thousand Voices at the Albert Hall},
  booktitle = {The Bahá'í World, Volume XIV (1963-1968)},
  year = {1974},
  publisher = {Bahá'í World Centre},
  pages = {57-80},
  url = {https://bahai.works/Bah%C3%A1%E2%80%99%C3%AD_World/Volume_14/The_Most_Great_Jubilee},
}

APA:
Beatrice Ashton. (1974). Six Thousand Voices at the Albert Hall. In *The Bahá'í World, Volume XIV (1963-1968)* (p. 57-80). Bahá'í World Centre.

MLA:
Beatrice Ashton. "Six Thousand Voices at the Albert Hall." *The Bahá'í World, Volume XIV (1963-1968)*, Bahá'í World Centre, 1974, p. 57-80.

Chicago:
Beatrice Ashton. "Six Thousand Voices at the Albert Hall." In *The Bahá'í World, Volume XIV (1963-1968)*, 57-80. Bahá'í World Centre, 1974.