Goleman, D. (2014). Focus: The hidden driver of excellence. Bloomsbury.
Chicago Style (17th ed.) ZitazioaGoleman, Daniel. Focus: The Hidden Driver of Excellence. London: Bloomsbury, 2014.
MLA (9th ed.) ZitazioaGoleman, Daniel. Focus: The Hidden Driver of Excellence. Bloomsbury, 2014.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.