DAHL, R. Three Teaching Methods Used during North America’s First Seven-Year Plan. The Journal of Bahá’í Studies, Ottawa, Ontario, Canada, v. 5, n. 3, p. 1–15, 1993. DOI: 10.31581/jbs-5.3.1(1993). Disponível em: https://journal.bahaistudies.ca/online/article/view/77. Acesso em: 18 mar. 2024.