Nicholas Copernicus University. (2000). Logic and Logical Philosophy. Nicholas Copernicus University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNicholas Copernicus University. Logic and Logical Philosophy. Torun, Polonia: Nicholas Copernicus University Press, 2000.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNicholas Copernicus University. Logic and Logical Philosophy. Nicholas Copernicus University Press, 2000.
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