Rujukan Ralf_Schumacher

  1. ↑ "Ralf Schumacher retires from racing to take managerial role". autosport.com. Dicapai 9 Jun 2013. 
  2. ↑ "Ralf Schumacher biography and information". celebrina.com. 23 Julai 2007. Dicapai 4 Jun 2013. 
  3. ↑ "Ralf Schumacher compared with Montoya, Trulli, Button, Fisichella and Zanardi". F1-facts.com. Dicapai 4 Jun 2013. 
  4. ↑ "Replacing Ralf..." grandprix.com. 31 Mei 2007. Dicapai 4 Jun 2013. 
  5. ↑ "Toyota boss urges Ralf to improve form". autosport.com. 13 Jun 2007. Dicapai 5 Jun 2013. 
  6. ↑ "Ralf offers $17m pay-cut for 2008". formula1sport.net. 4 Julai 2007. 
  7. ↑ Ralf leaves Toyota ralf-schumacher.de - 1 Oktober 2007
  8. ↑ "Schumacher set to quit Toyota". BBC. 2 Oktober 2007. Dicapai 5 Jun 2013. 
  9. ↑ "Ralf Schumacher News". planet-f1.com. Dicapai 5 Jun 2013. 
  10. ↑ Jonathan Noble, Jonathan (25 Ogos 2007). "Berger: Ralf sounded out Toro Rosso". autosport.com. Dicapai 5 Jun 2013. 
  11. ↑ "Ralf Schumacher News". planet-f1.com. Dicapai 5 Jun 2013. 
  12. ↑ "Ralf Schumacher News". planetf1.com. Dicapai 5 Jun 2013. 
  13. ↑ "UpdateF1 >> Formula 1 News > Ralf - F1 career could be over". formula-1.updatesport.com. Dicapai 5 Jun 2013. 
  14. ↑ "Ralf Schumacher rejected F1 return". crash.net. 
  15. ↑ "DTM News: Mercedes waiting on Ralf's decision". autosport.com. 2008-01-17. Dicapai 5 Jun 2013. 
  16. ↑ "Ralf confirms Mercedes DTM deal". autosport.com. 18 Februari 2008. Dicapai 5 Jun 2013.