APA (7th ed.) Citation

Spencer, H. (1904). First principles (Éd. de luxe.). J.A. Hill and company.

Chicago Style (17th ed.) Citation

Spencer, Herbert. First Principles. Éd. de luxe. New York: J.A. Hill and company, 1904.

MLA (9th ed.) Citation

Spencer, Herbert. First Principles. Éd. de luxe. J.A. Hill and company, 1904.