APA (7th ed.) Citation

Laski, H. J. (1917). Studies in the problem of sovereignty. Yale university press; [etc., etc.].

Chicago Style (17th ed.) Citation

Laski, Harold J. Studies in the Problem of Sovereignty. New Haven: Yale university press; [etc., etc.], 1917.

MLA (9th ed.) Citation

Laski, Harold J. Studies in the Problem of Sovereignty. Yale university press; [etc., etc.], 1917.