1. Auer, C., & Srugies, A. (2013). Public diplomacy in Germany. CPD. Perspectives on public diplomacy, paper 5. Los Angeles, CA: USC Center on Public Diplomacy.
2. Bortree, D. S.‚ & Seltzer, T. (2009). Dialogic strategies and outcomes: An analysis of environmental advocacy groups’ Facebook profiles. Public Relations Review, 35, 317–319.
3. Bowen, S. A. (2004). Expansion of ethics as the tenth generic principle of public relations excellence: A Kantian theory and model for managing ethical issues. Journal of Public Relations Research, 16(1), 65–92.
4. Breakenridge, D. (2008) PR 2.0: New media, new tools, new audiences. Upper Saddle River, NJ: Pearson Education.
5. Coombs, W. T., & Holladay, S. J. (2010). PR strategy and application: Managing influence. West Sussex, UK: Wiley.