Dyfyniad APA

Norton, P. (2003). Peter Norton's essential concepts (5th ed.). Glencoe/McGraw-Hill.

Dyfyniad Arddull Chicago

Norton, Peter. Peter Norton's Essential Concepts. 5th ed. New York: Glencoe/McGraw-Hill, 2003.

Dyfyniad MLA

Norton, Peter. Peter Norton's Essential Concepts. 5th ed. Glencoe/McGraw-Hill, 2003.

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