Spencer, H. Essays: Scientific, Political, & Speculative; Vol. 1 of 3 Library Edition (1891), Containing Seven Essays not before Republished, and Various other Additions.
Style de citation Chicago (17e éd.)Spencer, Herbert. Essays: Scientific, Political, & Speculative; Vol. 1 of 3 Library Edition (1891), Containing Seven Essays Not Before Republished, and Various Other Additions.
Style de citation MLA (9e éd.)Spencer, Herbert. Essays: Scientific, Political, & Speculative; Vol. 1 of 3 Library Edition (1891), Containing Seven Essays Not Before Republished, and Various Other Additions.
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