BERTELSEN, H. Fred Singleton: A Short History af Finland. (Cambridge University Press, 1989). 211 s. Historie/Jyske Samlinger, [S. l.], n. 3, p. 526, 1991. Disponível em: https://tidsskrift.dk/historiejyskesamling/article/view/40361. Acesso em: 7 maj. 2024.