Cita APA (7a ed.)
Spencer, H. (1892). Essays Scientific, Political, and Speculative: Volume II.
Cita estilo Chicago (17a ed.)
Spencer, Herbert. Essays Scientific, Political, and Speculative: Volume II. 1892.
Cita MLA (9a ed.)
Spencer, Herbert. Essays Scientific, Political, and Speculative: Volume II. 1892.
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