1. Conglomeration among the top American public relations agencies: a case study;Public Relations Review,2014
2. Gross domestic product: an economy's all;International Monetary Fund,2020
3. Field listing - internet users;Central Intelligence Agency [CIA];The World Factbook,2019
4. Social, political, and economic contexts: keys in educating true public relations professionals;Public Relations Review,1992
5. Culbertson, H.M., Jeffers, D.W., Stone, D.B. and Terrell, M. (1993), “Researching the SPE context”, in Culbertson, H.M., Jeffers, D.W., Stone, D.B. and Terrell, M. (Eds), Social, Political, and Economic Contexts in Public Relations: Theory and Cases, 1st ed., Lawrence Erlbaum Associates, Mahwah, NJ, pp. 32-50.