The quote is from Rockefeller quoting his business partner Flagler. For a primary source, see "Random reminiscences of men and events" by JD Rockefeller, 1913.

The quote is from Rockefeller quoting his business partner Flagler. For a primary source, see "Random reminiscences of men and events" by JD Rockefeller, 1913. Google Books is great for verifying this sort of quote: http://books.google.com/books?id=IHnZAAAAMAAJ&dq=A%20friendship%20founded%20on%20business%20is%20a%20good%20deal%20better%20than%20a%20business%20founded%20on%20friendship&pg=PA12#v=onepage&q=A%20friendship%20founded%20on%20business%20is%20a%20good%20deal%20better%20than%20a%20business%20founded%20on%20friendship&f=false http://books.google.com/books?id=IHnZAAAAMAAJ&dq=A%20fri...