APA (7th ed.) Citation

Roam, D. (2009). Unfolding the napkin: The hands-on method for solving complex problems with simple pictures (1. publ.). Portfolio.

Chicago Style (17th ed.) Citation

Roam, Dan. Unfolding the Napkin: The Hands-on Method for Solving Complex Problems with Simple Pictures. 1. publ. New York [u.a.]: Portfolio, 2009.

MLA (9th ed.) Citation

Roam, Dan. Unfolding the Napkin: The Hands-on Method for Solving Complex Problems with Simple Pictures. 1. publ. Portfolio, 2009.