Cita APA (7a ed.)

Samuelson, P. A. (2008). Economics,18e (18.). T M H.

Cita Chicago Style (17a ed.)

Samuelson, Paul A. Economics,18e. 18. New Delhi: T M H, 2008.

Cita MLA (9a ed.)

Samuelson, Paul A. Economics,18e. 18. T M H, 2008.