APA (7th ed.) Citation

Roam, D. (2010). The back of the napkin: Solving problems and selling ideas with pictures (Expanded ed.). Portfolio.

Chicago Style (17th ed.) Citation

Roam, Dan. The Back of the Napkin: Solving Problems and Selling Ideas with Pictures. Expanded ed. New York, NY [u.a.]: Portfolio, 2010.

MLA (9th ed.) Citation

Roam, Dan. The Back of the Napkin: Solving Problems and Selling Ideas with Pictures. Expanded ed. Portfolio, 2010.