Barnes, Harry E. (September 1917). "Sociology Before Comte: A Summary of Doctrines and an Introduction to the Literature". American Journal of Sociology. 23 (2): 234. doi:10.1086/212733. JSTOR2763534. S2CID143916665.
Barnes, Harry E. (September 1917). "Sociology Before Comte: A Summary of Doctrines and an Introduction to the Literature". American Journal of Sociology. 23 (2): 234. doi:10.1086/212733. JSTOR2763534. S2CID143916665.
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Selections from the Scottish Philosophy of Common Sense, ed. by G. A. Johnston (1915), essays by Thomas Reid, Adam Ferguson, James Beattie, and Dugald Stewart (online version).
Barnes, Harry E. (September 1917). "Sociology Before Comte: A Summary of Doctrines and an Introduction to the Literature". American Journal of Sociology. 23 (2): 234. doi:10.1086/212733. JSTOR2763534. S2CID143916665.