Cita APA (7th ed.)

Samuelson, P., & Nordhaus, W. (2015). Economics (19th ed.). McGraw Hill.

Cita Chicago (17th ed.)

Samuelson, Paul, i William Nordhaus. Economics. 19th ed. INDIA: McGraw Hill, 2015.

Cita MLA (9th ed.)

Samuelson, Paul, i William Nordhaus. Economics. 19th ed. McGraw Hill, 2015.