Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Groucho Marx:

"

Minnie Marx did not have an entertainment industry career but had intense ambition for her sons to go on the stage like their uncle. While pushing her second son Leonard (Chico Marx) in piano lessons, she found that Julius had a pleasant soprano voice and the ability to remain on key. Julius's early career goal was to become a doctor, but the family's need for income forced him out of school at the age of twelve. By that time Julius had become a voracious reader, particularly fond of Horatio Alger. Marx continued to overcome his lack of formal education by becoming very well-read.[citation needed]