Korhonen, N. (2011). What makes a champion?: Motorcycle world champions' recipe for success.
Chicago-viite (17. p.)Korhonen, Nita. What Makes a Champion?: Motorcycle World Champions' Recipe for Success. Jyväskylä, 2011.
MLA-viite (9. p.)Korhonen, Nita. What Makes a Champion?: Motorcycle World Champions' Recipe for Success. 2011.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.