Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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