Tham khảo Ludovico Sforza

  1. ↑ Vezzosi, Alessandro (1997). Leonardo da Vinci: Renaissance Man. New Horizons. Bonfante-Warren, Alexandra biên dịch . London, UK: Thames & Hudson. tr. 53. ISBN 978-0-500-30081-7.
  2. ↑ Cf. John E. Morby (1978). “The Sobriquets of Medieval European Princes”. Canadian Journal of History. 13 (1): 13.

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