Kubitz, O. A. (1932). Development of John Stuart Mill's System of logic. The University of Illinois.
Čikaški stil citiranja (17. izdanje)Kubitz, Oskar Alfred. Development of John Stuart Mill's System of Logic. Urbana: The University of Illinois, 1932.
MLA način citiranja (9. izdanje)Kubitz, Oskar Alfred. Development of John Stuart Mill's System of Logic. The University of Illinois, 1932.
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