APA (7th ed.) Citation

Spencer, H. (1892). First principles. D. Appleton.

Chicago Style (17th ed.) Citation

Spencer, Herbert. First Principles. New York: D. Appleton, 1892.

MLA (9th ed.) Citation

Spencer, Herbert. First Principles. D. Appleton, 1892.

Warning: These citations may not always be 100% accurate.