Nye, J. S., & Welch, D. (2011). Understanding global conflict and cooperation: An introduction to theory and history (8th ed.). Pearson Longman.

Nye, Joseph S., and David Welch. Understanding Global Conflict and Cooperation: An Introduction to Theory and History. 8th ed. Boston: Pearson Longman, 2011.

Nye, Joseph S., and David Welch. Understanding Global Conflict and Cooperation: An Introduction to Theory and History. 8th ed. Pearson Longman, 2011.