APA (7th ed.) Citation

South-western college publishing & Arnold, R. (1998). Economics (4th.). South-western college publishing.

Chicago Style (17th ed.) Citation

South-western college publishing and R. Arnold. Economics. 4th. Ohio: South-western college publishing, 1998.

MLA (8th ed.) Citation

South-western college publishing and R. Arnold. Economics. 4th. South-western college publishing, 1998.