SEMPLE, I. Towards a Spiritual Civilization. The Journal of Bahá’í Studies, Ottawa, Ontario, Canada, v. 11, n. 3-4, 2001. DOI: 10.31581/jbs-11.3-4.3(2001). Disponível em: https://journal.bahaistudies.ca/online/article/view/120. Acesso em: 27 sep. 2021.