Dyfyniad APA

Kelley, D. (2013). Art of Reasoning: Introduction to Logic (4th.). Norton.

Dyfyniad Arddull Chicago

Kelley, David. Art of Reasoning: Introduction to Logic. 4th. New york: Norton, 2013.

Dyfyniad MLA

Kelley, David. Art of Reasoning: Introduction to Logic. 4th. Norton, 2013.

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