Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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