APA
Dan Roam, . (2009). Back of the Napkin: solving problems and selling ideas with pictures. : Marshall Cavendish Business.
Chicago
Dan Roam, . 2009. Back of the Napkin: solving problems and selling ideas with pictures. : Marshall Cavendish Business.
Harvard
Dan Roam, . (2009). Back of the Napkin: solving problems and selling ideas with pictures. : Marshall Cavendish Business.
MLA
Dan Roam, . Back of the Napkin: solving problems and selling ideas with pictures. : Marshall Cavendish Business. 2009.