Dyfyniad APA

Fogelin, R. J. (2005). Understanding arguments: An introduction to informal logic (7th ed.). Thomson Wadsworth.

Dyfyniad Arddull Chicago

Fogelin, Robert J. Understanding Arguments: An Introduction to Informal Logic. 7th ed. Belmont, Calif: Thomson Wadsworth, 2005.

Dyfyniad MLA

Fogelin, Robert J. Understanding Arguments: An Introduction to Informal Logic. 7th ed. Thomson Wadsworth, 2005.

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