Cita APA (7th ed.)

Woodrow Wilson School of Public and International Affairs. Center of International Studies, Knorr, K. E., & Verba, S. (1961). The International system: Theoretical essays. Greenwood Press.

Cita Chicago (17th ed.)

Woodrow Wilson School of Public and International Affairs. Center of International Studies, Klaus Eugen Knorr, i Sidney Verba. The International System: Theoretical Essays. Westport, Conn: Greenwood Press, 1961.

Cita MLA (9th ed.)

Woodrow Wilson School of Public and International Affairs. Center of International Studies, et al. The International System: Theoretical Essays. Greenwood Press, 1961.