APA (7th ed.) Citation

Spencer, H. (1876). The principles of sociology: Vol. I. Williams and Norgate.

Chicago Style (17th ed.) Citation

Spencer, Herbert. The Principles of Sociology: Vol. I. London: Williams and Norgate, 1876.

MLA (8th ed.) Citation

Spencer, Herbert. The Principles of Sociology: Vol. I. Williams and Norgate, 1876.

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