Dyfyniad APA

Copi, I. M., & Rodych, V. C. (2019). Introduction to logic (15th ed.). Routledge.

Dyfyniad Arddull Chicago

Copi, Irving M., and Victor Cohen Rodych. Introduction to Logic. 15th ed. New York: Routledge, 2019.

Dyfyniad MLA

Copi, Irving M., and Victor Cohen Rodych. Introduction to Logic. 15th ed. Routledge, 2019.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.