Rickaby, J. (1889). Moral philosophy: Or ethics and natural law. Benziger Brothers.
Lua i Stíl Chicago (17ú heag.)Rickaby, Joseph. Moral Philosophy: Or Ethics and Natural Law. New York,: Benziger Brothers, 1889.
Lua MLA (8ú heag.)Rickaby, Joseph. Moral Philosophy: Or Ethics and Natural Law. Benziger Brothers, 1889.
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