Gray, J. (1996). Mill on liberty: A defence (2nd ed.). Routledge & K. Paul.
Lua i Stíl Chicago (17ú heag.)Gray, John. Mill on Liberty: A Defence. 2nd ed. London ; New York: Routledge & K. Paul, 1996.
Lua MLA (9ú heag.)Gray, John. Mill on Liberty: A Defence. 2nd ed. Routledge & K. Paul, 1996.
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