Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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