Riis, T. (1989) “John W. Baldwin: The Government of Philip Augustus: Foundations of French Royal Power in the Middle Ages. Berkeley - Los Angeles - London, University of California Press, 1986. xxi, 611 sider, ill. 50$”., Historisk Tidsskrift, 15. Tilgængelig hos: https://tidsskrift.dk/historisktidsskrift/article/view/53173 (Set: 6 december 2025).