“Two things fill the mind with ever new and increasing admiration and awe, the oftener and the more steadily we reflect on them: the starry heavens above and the moral law within.”

• APAImmanuel Kant. (n.d.). Critique of Practical Reason. Digital reproduction: SigPhi. https://sigphiai.com/en/works/immanuel-kant/critique-of-practical-reason
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• MLAImmanuel Kant. Critique of Practical Reason. Digital reproduction, SigPhi, https://sigphiai.com/en/works/immanuel-kant/critique-of-practical-reason.
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• ChicagoImmanuel Kant. Critique of Practical Reason. Digital reproduction, SigPhi. https://sigphiai.com/en/works/immanuel-kant/critique-of-practical-reason.
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Reference to the edition that SigPhi reproduces: SigPhi is its digital reproduction, not its publisher. The edition's year is not in the metadata (hence "n.d."), and the translator appears only when recorded.