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oxforddnb.com
Purdue, A. W. (September 2004). "Alexandra (1844–1925)", Oxford Dictionary of National Biography, Oxford University Press, doi:10.1093/ref:odnb/30375, retrieved 16 July 2009 (subscription required).
"Luisen-orden", Königlich Preussische Ordensliste (in German), vol. 1, Berlin, 1886, p. 1056, archived from the original on 1 October 2022 – via hathitrust.org{{citation}}: CS1 maint: location missing publisher (link)
"Elisabeth-orden", Hof- und Staatshandbuch der Österreichisch-Ungarischen Monarchie, Vienna: Druck und Verlag der K.K. Hof- und Staatsdruckerei, 1918, p. 328, archived from the original on 8 March 2023
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