1. G. Cowan and A. Arsenault, “Moving from Monologue to Dialogue to Collaboration: The Three Layers of Public Diplomacy,” The ANNALS of the American Academy of Political and Social Science 616, no. 1 (March 1, 2008): 10–30.
2. For a history of network analysis, see John P. Scott, Social Network Analysis: A Handbook, 2nd ed. (London: Sage Publications Ltd, 2000).
3. Valdis Krebs, “Mapping Networks of Terrorist Cells,” Connections 24, no. 3 (2002): 43–52.
4. Thomas W. Valente, Social Networks and Health: Models, Methods, and Applications, 1st ed. (New York: Oxford University Press, 2010).
5. Everett M. Rogers, Diffusion of Innovations (New York: Simon and Schuster, 1995).