Sources Consulted for Factual Information about Appassionata: The Extraordinary Life & Music of Sonia Eckhardt-Gramatté

• "IMDb: Appassionata: The Extraordinary Life & Music of Sonia Eckhardt-Gramatté" Internet Movie Database, Inc. https://www.imdb.com/title/tt0810759/reference.
• "Winnipeg Film Group" https://www.winnipegfilmgroup.com/. [official site]