Copi,Irving M Cohen, & Carl & Rodych,Victor. (2020). Introduction to logic (15.). Routledge.
Dyfyniad Arddull ChicagoCopi,Irving M Cohen, and Carl & Rodych,Victor. Introduction to Logic. 15. New York: Routledge, 2020.
Dyfyniad MLACopi,Irving M Cohen, and Carl & Rodych,Victor. Introduction to Logic. 15. Routledge, 2020.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.