Cita APA (7a ed.)

Samuelson, P. A. (2005). Economics (7th omson.). Thomson.

Cita Chicago Style (17a ed.)

Samuelson, Paul A. Economics. 7th omson. South- Western/Th Learning: Thomson, 2005.

Cita MLA (9a ed.)

Samuelson, Paul A. Economics. 7th omson. Thomson, 2005.