APA (7th ed.) Citation

Soule, G. H. (1942). The strength of nations: A study in social theory,. Macmillan Company.

Chicago Style (17th ed.) Citation

Soule, George Henry. The Strength of Nations: A Study in Social Theory,. New York: Macmillan Company, 1942.

MLA (9th ed.) Citation

Soule, George Henry. The Strength of Nations: A Study in Social Theory,. Macmillan Company, 1942.