Kegley, C. W., & Wittkopf, E. R. (1992). The Global agenda: Issues and perspectives (3rd ed.). McGraw-Hill.

Kegley, Charles W., and Eugene R. Wittkopf. The Global Agenda: Issues and Perspectives. 3rd ed. New York: McGraw-Hill, 1992.

Kegley, Charles W., and Eugene R. Wittkopf. The Global Agenda: Issues and Perspectives. 3rd ed. McGraw-Hill, 1992.