I'm writing an article about cycling and I want to include a well know quote from the professional cyclist Greg LeMond (the first American to win the Tour de France). The quote is:
The key is being able to endure psychologically. When you're not riding well, you think, why suffer? Why push yourself for four or five hours? The mountains are the pinnacle of suffering.
This quote is all over the Internet, but I'm having trouble finding the original source. I would like to properly attribute it in my citations.