Cumberford authored the 2006 book Auto Legends: Classics of Style And Design;[REF] the 2001 book Chris Bangle: BMW Global Design and the 2008 book Cars, the latter printed in Italian.
Cumberford was keynote speaker at "The Italian Avantgarde in Car Design" as part of the September 2002 exposition on Italian design in New York,[REF] and moderated the 2007 Classic Car Forum at the Pebble Beach Concours with Moray Callum, Andrea Zagato, Shiro Nakamura, Ed Welburn, and Ian Callum [REF].