Lua APA (7ú heag.)

Mill, J. S. (1889). A System of Logic: By John Stuart Mill (People's ed.). Longmans.

Lua i Stíl Chicago (17ú heag.)

Mill, John Stuart. A System of Logic: By John Stuart Mill. People's ed. London [u.a.]: Longmans, 1889.

Lua MLA (8ú heag.)

Mill, John Stuart. A System of Logic: By John Stuart Mill. People's ed. Longmans, 1889.

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