Ghi chú Aleksandr_I_của_Bulgaria

  1. J. D. B. (1910). “Bulgaria (Prince Alexander)”. The Encyclopaedia Britannica; A Dictionary of Arts, Sciences, Literature and General Information. IV (BISHARIN to CALGARY) (ấn bản 11). Cambridge, England: At the University Press. tr. 782. Truy cập ngày 12 tháng 7 năm 2018 – qua Internet Archive.
  2. John Belchem và Richard Price, ấn bản A Dictionary of 19th-Century World History (1994) tr. 66.
  3. Ridley, "The Heir Apparent", (New York, 2013)

Tài liệu tham khảo

WikiPedia: Aleksandr_I_của_Bulgaria https://archive.org/stream/encyclopaediabri04chisr... https://archive.org/details/in.ernet.dli.2015.2759... https://search.proquest.com/openview/a22f14375aef6... https://archive.org/details/alexandervonbatt0000co... https://archive.org/details/tsaristrussiabal00jela... https://books.google.com/books?hl=en&lr=&id=cWYxAQ... https://archive.org/details/balkanssince145300lsst https://archive.org/details/balkanssince145300lsst... https://commons.wikimedia.org/wiki/Category:Alexan... https://archive.org/details/eminentpersonsbi06time...