APA (7th ed.) Citation

Spencer, H. (1892). The principles of ethics. D. Appleton and Company.

Chicago Style (17th ed.) Citation

Spencer, Herbert. The Principles of Ethics. New York: D. Appleton and Company, 1892.

MLA (9th ed.) Citation

Spencer, Herbert. The Principles of Ethics. D. Appleton and Company, 1892.

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