J. V. Jespersen, K. (1979) “C. Northcote Parkinson: Gunpowder, Treason and Plot. London, Weidenfeld and Nicolson 1976. 139 s., ill. £5.25”., Historisk Tidsskrift, 13. Tilgængelig hos: https://tidsskrift.dk/historisktidsskrift/article/view/52195 (Set: 5 december 2025).