APA (7th ed.) Citation

Gierke, O. F. v. (1958). Political theories of the Middle Age. Beacon Press.

Chicago Style (17th ed.) Citation

Gierke, Otto Friedrich von. Political Theories of the Middle Age. Boston: Beacon Press, 1958.

MLA (9th ed.) Citation

Gierke, Otto Friedrich von. Political Theories of the Middle Age. Beacon Press, 1958.