Tohutoro APA (7th ed.)
Pieper, J. (1968). Justicia y fortaleza (1a ed.). Rialp.
Tohutoru Kātū Chicago (17th ed.)
Pieper, Josef. Justicia Y Fortaleza. 1a ed. Madrid: Rialp, 1968.
Tohutoro MLA (9th ed.)
Pieper, Josef. Justicia Y Fortaleza. 1a ed. Rialp, 1968.
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