APA aipamena

Willoughby, W. F. (1919). An introduction to the study of the government of modern states. The Century co.

Chicago Style aipamena

Willoughby, William Franklin. An Introduction to the Study of the Government of Modern States. New York: The Century co, 1919.

MLA aipamena

Willoughby, William Franklin. An Introduction to the Study of the Government of Modern States. The Century co, 1919.