Who said "Leaders aren't born, they're made."?

This quote is attributed to Bart Simpson.

Leaders aren't born, they're made. - Bart Simpson

"Leaders aren't born, they're made."

Bart Simpson Leadership

"Eat my shorts!"

"Ay caramba!"

"Don't have a cow, man."

"Cowabunga!"

"A leader must be fair and just."

"Integrity is everything."

"One must take responsibility for one's environment."

"In this house, I make the decisions"