* {{cite book | last=Mitchell | first=A. Wess | title=The Grand Strategy of the Habsburg Empire | publisher=Princeton University Press | publication-place=Princeton Oxford | date=2019-10 | isbn=978-0-691-19644-2}}
<ref name="b520">{{cite book | last=Mitchell | first=A. Wess | title=The Grand Strategy of the Habsburg Empire | publisher=Princeton University Press | publication-place=Princeton Oxford | date=2019-10 | isbn=978-0-691-19644-2 | page=}}</ref>