Astrid of Belgium, Archduchess of Austria-Este, Duchess of Modena, Princess Imperial of Austria, Princess Royal of Hungary and Bohemia 1962년 6월 5일~ )는 벨기에의
36–쪽. ISBN 978-1-58544-480-9. 2011년 7월 14일에 확인함. Eric Roman (2003). 《Austria-Hungary & the successor states: a reference guide from the Renaissance to the
ISBN 978-1-77089-273-6. Herwig, Holger H. (2014). 《The First World War: Germany and Austria-Hungary, 1914–1918》 2판. London: Bloomsbury Publishing. ISBN 978-1-4725-0885-0