Diffusion of Innovations. In L.L. Kaid & C. Holtz-Bacha (Eds.), Encyclopedia of Political Communication (pp. 182-186). Thousand Oaks, CA: Sage Publications —- Arvind Singhal and Margaret M. Quinlan (2008) —- http://utminers.utep.edu/asinghal/Articles%20and%20Chapters/Journal%20Articles/Singhal-Quinlan-DOI-Encycl-of-POCO-2008.pdf