Citazione Stile APA (7a Edizione)
Roam, D. (2009). The back of the napkin: Solving problems and selling ideas with pictures. Marshall Cavendish.
Citazione stile Chigago Style (17a edizione)
Roam, Dan. The Back of the Napkin: Solving Problems and Selling Ideas with Pictures. London: Marshall Cavendish, 2009.
Citatione MLA (9a ed.)
Roam, Dan. The Back of the Napkin: Solving Problems and Selling Ideas with Pictures. Marshall Cavendish, 2009.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.