HEMMAT, A. Reflections on The Four Valleys of Bahá’u’lláh. The Journal of Bahá’í Studies, Ottawa, Ontario, Canada, v. 30, n. 4, p. 11–51, 2021. DOI: 10.31581/jbs-30.4.300(2020). Disponível em: https://journal.bahaistudies.ca/online/article/view/300. Acesso em: 24 oct. 2021.