Lua APA (7ú heag.)
Friedrich, C. J. (1965). The philosophy of law in historical perspective (2d ed.). University of Chicago P..
Lua i Stíl Chicago (17ú heag.)
Friedrich, Carl J. The Philosophy of Law in Historical Perspective. 2d ed. [Chicago]: University of Chicago P., 1965.
Lua MLA (9ú heag.)
Friedrich, Carl J. The Philosophy of Law in Historical Perspective. 2d ed. University of Chicago P., 1965.
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