Jane Bryant Quinn (2009). “Making the Most of Your Money Now: The Classic Bestseller Completely Revised for the New Economy”, p.1073, Simon and Schuster
"COVER STORY : Ob-la-di, Life Goes On : Paul McCartney was crushed by the Beatles' dissolution in 1970, but he's singing a different tune now (about and with the group)". Interview with Robert Hilburn, articles.latimes.com. November 12, 1995.