APA (7th ed.) Zitazioa
Spencer, H. (1892). Essays Scientific, Political, and Speculative: Volume III.
Chicago Style (17th ed.) Zitazioa
Spencer, Herbert. Essays Scientific, Political, and Speculative: Volume III. 1892.
MLA (9th ed.) Zitazioa
Spencer, Herbert. Essays Scientific, Political, and Speculative: Volume III. 1892.
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