Coba jelasin Rujuakan dari Katurunan Ratu Victoria jo Rajo Christian IX dalam bahasa minangkabau dong

Aronson, Theo. Crowns in Conflict: The Triumph and the Tragedy of European Monarchy 1910–1918

Aronson, Theo.  A Family of Kings: The Descendants of Christian IX of Denmark

Aronson, Theo.  Grandmama of Europe: The Crowned Descendants of Queen Victoria, 1973

Carter, Miranda. Three Emperors: Three Cousins, Three Empires and the Road to the First World War. London, Penguin. 2009. ISBN 978-0-670-91556-9

Gelardi, Julia P.  Born to Rule: Five Reigning Consorts, Granddaughters of Queen Victoria

Potts, D. M. and W. T. W.  Queen Victoria's Gene: Haemophilia and the Royal Family