SLADE, H Gordon. Craigston Castle, Aberdeenshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 108, p. 262–299, 1979. DOI: 10.9750/PSAS.108.262.299. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8973. Acesso em: 3 may. 2024.