Kayser Nielsen, N. (2000) “Fred Singleton: A Short History of Finland. Revised and updated by A.F. Aston. 2nd edition. (Cambridge University Press, 1998). 209 s., 35 £”., Historie/Jyske Samlinger, s. 203. Tilgængelig hos: https://tidsskrift.dk/historiejyskesamling/article/view/38017 (Set: 7 december 2025).