APA (7th ed.) Citation

Laski, H. J. (1919). Authority in the modern state. Yale university press; [etc., etc.].

Chicago Style (17th ed.) Citation

Laski, Harold Joseph. Authority in the Modern State. New Haven: Yale university press; [etc., etc.], 1919.

MLA (9th ed.) Citation

Laski, Harold Joseph. Authority in the Modern State. Yale university press; [etc., etc.], 1919.