2013年のドイツツーリングカー選手権
"The former Formula 1 driver is ending his DTM career after three seasons and 33 races in order to concentrate more on his role as a Formula 1 expert and commentator for the BBC"
↑ O'Leary, Jamie (2012年2月6日). “Marco Wittmann joins BMW as DTM reserve and GT race driver”. Autosport.com (Haymarket Publications). http://www.autosport.com/news/report.php/id/97338 2012年12月2日閲覧。
↑ O'Leary, Jamie (2012年10月19日). “Susie Wolff to leave DTM after 2012”. Autosport (Haymarket Publications). http://www.autosport.com/news/report.php/id/103545 2012年11月4日閲覧。
↑ “2013 DTM calendar - Debut appearance in Moscow”. Deutsche Tourenwagen Masters (ITR e.V.). (2012年10月23日). http://www.dtm.com/en/News/2013-DTM-calendar---Debut-appearance-in-Moscow.html 2012年11月4日閲覧。
↑ “Compact season comprising 10 races held in a two-week rhythm”.