DE VILLIERS, Pieter Gideon Retief; MARCHINKOWSKI, George. Sabbath Keeping and Sunday Observance as Spiritual Practice. Stellenbosch Theological Journal, [S. l.], v. 6, n. 2, p. 175–200, 2021. DOI: 10.17570/stj.2020.v6n2.a8. Disponível em: https://ojs.reformedjournals.co.za/index.php/stj/article/view/2097. Acesso em: 18 oct. 2025.