KERR, Robert; LOCKIE, J R. Communion Tokens of the Church of Scotland: Nineteenth and Twentieth Centuries. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 77, p. 49–146, 1943. DOI: 10.9750/PSAS.077.49.146. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8196. Acesso em: 5 may. 2024.