APA citiranje

Roam, D. (2012). The back of the napkin: Solving problems and selling ideas with pictures. London: Marshall Cavendish Business.

Παραπομπή Chicago Style

Roam, Dan. The Back of the Napkin: Solving Problems and Selling Ideas With Pictures. London: Marshall Cavendish Business, 2012.

MLA citiranje

Roam, Dan. The Back of the Napkin: Solving Problems and Selling Ideas With Pictures. London: Marshall Cavendish Business, 2012.