Rühl, O. (1978) “Bruce Waller: Bismarck at the Crossroads. The Reorientation of German Foreign Policy after the Congress of Berlin 1878-1880. London, The Athlone Press, 1974. 273 s. £ 6.00”., Historisk Tidsskrift, 13. Tilgængelig hos: https://tidsskrift.dk/historisktidsskrift/article/view/51985 (Set: 5 december 2025).