Dave Smith, Chief Archivist Emeritus of the Walt Disney Archives.Disney Trivia from the Vault: Secrets Revealed and Questions Answered (англ.). — Disney Editions, 2012. — ISBN 9781423178576.. — «Q: Who are Huey, Dewey, and Louie’s parents? Do they appear in any of the cartoons? Sarina, Montreal, Quebec, Canada. A: According to the cartoon Donald’s Nephews, Donald receives a postcard from his sister, Dumbella, saying she is sending the three for a visit. That is the only time we ever hear of Dumbella, and a father’s name is never mentioned.».
