Bertke, S. (1941). The possibility of invincible ignorance of the natural law. Catholic University of America Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBertke, Stanley. The Possibility of Invincible Ignorance of the Natural Law. Washington, D.C.: Catholic University of America Press, 1941.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBertke, Stanley. The Possibility of Invincible Ignorance of the Natural Law. Catholic University of America Press, 1941.
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