APA (7e ed.) Bronvermelding
Roam, D. (2009). The back of the napkin: Solving problems and selling ideas with pictures. Marshall Cavendish.
Chicago (17e ed.) Bronvermelding
Roam, Dan. The Back of the Napkin: Solving Problems and Selling Ideas with Pictures. London: Marshall Cavendish, 2009.
MLA (9e ed.) Bronvermelding
Roam, Dan. The Back of the Napkin: Solving Problems and Selling Ideas with Pictures. Marshall Cavendish, 2009.
Let op: Deze citaties zijn niet altijd 100% accuraat.