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 Knights of Labor:

"

Scholars pit the skilled and unskilled workers as another reason for the Knights of Labor's downfall. The Union worked for both groups, but since the results of the union efforts often benefited one or the other and not both, the tension persisted.[1] Unskilled workers often benefited from equal opportunities. Skilled workers would become upset when someone took their jobs with less skill. Skilled workers benefit from better pay, but many unskilled workers do not receive those benefits. This tension discouraged new members and lead existing ones to leave the Knights of Labor and ultimately caused many members to leave.[citation needed]