Gaya APA

Roth-Isigkeit, D. et al (2016). System, and International Law: The Early History of International Legal Thought from Machiavelli to Hegel . New York: Oxford University Press.

Gaya MLA

Roth-Isigkeit, David. et al. "System, and International Law: The Early History of International Legal Thought from Machiavelli to Hegel". New York: Oxford University Press, 2016. .