Kelsen, K. (2010). Unleashing the power of digital signage: Content strategies for the 5th screen. Focal Press.
Chicago-referens (17:e uppl.)Kelsen, Keith. Unleashing the Power of Digital Signage: Content Strategies for the 5th Screen. Burlington, Mass: Focal Press, 2010.
MLA-referens (9:e uppl.)Kelsen, Keith. Unleashing the Power of Digital Signage: Content Strategies for the 5th Screen. Focal Press, 2010.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.