APA (7th ed.) Citation

Mangoldt, H. v., & Rittberger, V. (1997). The United Nations system and its predecesors. University Press.

Chicago Style (17th ed.) Citation

Mangoldt, Hans von, and Volker Rittberger. The United Nations System and Its Predecesors. Oxford [etc.]: University Press, 1997.

MLA (9th ed.) Citation

Mangoldt, Hans von, and Volker Rittberger. The United Nations System and Its Predecesors. University Press, 1997.