Ladewig Petersen, E. (1983) “Patricia Crone: Slaves on Horses. The Evolution of the Islamic Polity. Cambridge University Press, 1980. viii + 320 s. £ 17.50”., Historisk Tidsskrift, 14. Tilgængelig hos: https://tidsskrift.dk/historisktidsskrift/article/view/52578 (Set: 6 december 2025).