DI FOLCO, John. St Fillan’s Church, Forgan, Fife. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 107, p. 324–329, 1978. DOI: 10.9750/PSAS.107.324.329. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8953. Acesso em: 4 may. 2024.