Cita APA (7th ed.)

Samuelson, P. A. (1985). Economics (12th.). McGraw-Hill.

Cita Chicago (17th ed.)

Samuelson, Paul A. Economics. 12th. Singapore: McGraw-Hill, 1985.

Cita MLA (9th ed.)

Samuelson, Paul A. Economics. 12th. McGraw-Hill, 1985.