Career
Hettinga as crew in the Dutch Soling with Willem Potma as helmsman and Gerhard Potma as fellow crew Hettinga took 15th place. Owner: Easysup Supstore (2013 – Present)
Owner: Hettinga Jacht Service (2007 – Present)
Director: Hettinga Jacht-Service (2007 – Present)
Director and owner: Hettinga wajer jachtbouw heeg (1998–2007)
Project manager: Royal Deck (2008–2011)
Production coordinator: de Vries Makkum (2010–2013)
"The Official Report of the Centennial Olympic Games, Volume I Planning and Organization" (Postdoctoral fellows). Atlanta: Peachtree Publishers.
1997.
Retrieved 19 February 2014. "The Official Report of the Centennial Olympic Games, Volume II The Centennial Olympic Games" (Postdoctoral fellows). Atlanta: Peachtree Publishers.
1997.
Retrieved 19 February 2014. "The Official Report of the Centennial Olympic Games, Volume III The Competition Results" (Postdoctoral fellows). Atlanta: Peachtree Publishers.
1997.
Retrieved 19 February 2014.