Nicholas Copernicus University. (2000). Logic and Logical Philosophy. Nicholas Copernicus University Press.
Lua i Stíl Chicago (17ú heag.)Nicholas Copernicus University. Logic and Logical Philosophy. Torun, Polonia: Nicholas Copernicus University Press, 2000.
Lua MLA (8ú heag.)Nicholas Copernicus University. Logic and Logical Philosophy. Nicholas Copernicus University Press, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.