Vas, L. (2003). Nine roads to success at work and in life. English Edition.
Chicago-viite (17. p.)Vas, Luis. Nine Roads to Success at Work and in Life. Mumbai: English Edition, 2003.
MLA-viite (9. p.)Vas, Luis. Nine Roads to Success at Work and in Life. English Edition, 2003.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.