Cita APA (7th ed.)

Samuelson, P. (2005). Macroeconomics (18th.). McGraw Hill.

Cita Chicago (17th ed.)

Samuelson, Paul. Macroeconomics. 18th. NewYork: McGraw Hill, 2005.

Cita MLA (9th ed.)

Samuelson, Paul. Macroeconomics. 18th. McGraw Hill, 2005.