URQUHART, James. Preliminary Notice of the Seals of the Royal Burghs of Scotland. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 30, p. 253–266, 1896. DOI: 10.9750/PSAS.030.253.266. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6624. Acesso em: 19 may. 2024.