Cita APA (7a ed.)

Spencer, H. (1966). The principles of sociology (Reprint of the ed. 1904.). Otto Zeller.

Cita Chicago Style (17a ed.)

Spencer, Herbert. The Principles of Sociology. Reprint of the ed. 1904. Osnabrück: Otto Zeller, 1966.

Cita MLA (9a ed.)

Spencer, Herbert. The Principles of Sociology. Reprint of the ed. 1904. Otto Zeller, 1966.