(1999). Sparks of genius: The thirteen thinking tools of the world's most creative people / Robert and Michèle Root-Bernstein.
Citazione stile Chigago Style (17a edizione)Sparks of Genius: The Thirteen Thinking Tools of the World's Most Creative People / Robert and Michèle Root-Bernstein. 1999.
Citatione MLA (9a ed.)Sparks of Genius: The Thirteen Thinking Tools of the World's Most Creative People / Robert and Michèle Root-Bernstein. 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.