APA (7th ed.) Citation

Roam, D. (2008). The back of the napkin: Solving problems and selling ideas with pictures (1. publ.). Portfolio.

Chicago Style (17th ed.) Citation

Roam, Dan. The Back of the Napkin: Solving Problems and Selling Ideas with Pictures. 1. publ. New York: Portfolio, 2008.

MLA (9th ed.) Citation

Roam, Dan. The Back of the Napkin: Solving Problems and Selling Ideas with Pictures. 1. publ. Portfolio, 2008.