MLA

Wolfrum, Rüdiger, Volker Röben, and Rudiger Wolfrum. Legitimacy In International Law. Springer Berlin Heidelberg, 2008.

APA

Wolfrum, R., Röben, V.Wolfrum, R. (2008). Legitimacy in International Law. Springer Berlin Heidelberg.

Chicago

Wolfrum, Rüdiger, Volker Röben, Volker Röben, and Rudiger Wolfrum. Legitimacy In International Law. : Springer Berlin Heidelberg, 2008.