APA (7th ed.) Zitazioa

Spencer, H. (1873). Principes de psychologie. Félix Alcan.

Chicago Style (17th ed.) Zitazioa

Spencer, Herbert. Principes De Psychologie. París: Félix Alcan, 1873.

MLA (9th ed.) Zitazioa

Spencer, Herbert. Principes De Psychologie. Félix Alcan, 1873.