Kelsen, K. (2010). Unleashing the power of digital signage: Content strategies for the 5th screen. Focal Press.
Lua i Stíl Chicago (17ú heag.)Kelsen, Keith. Unleashing the Power of Digital Signage: Content Strategies for the 5th Screen. Burlington, Mass: Focal Press, 2010.
Lua MLA (9ú heag.)Kelsen, Keith. Unleashing the Power of Digital Signage: Content Strategies for the 5th Screen. Focal Press, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.