Cita APA (7th ed.)

Samuelson. Paula & William D. Nordhaus. (2010). Economics (Nineteenth Edition.). The Mc Graw Hill.

Cita Chicago (17th ed.)

Samuelson. Paula i William D. Nordhaus. Economics. Nineteenth Edition. New York: The Mc Graw Hill, 2010.

Cita MLA (9th ed.)

Samuelson. Paula i William D. Nordhaus. Economics. Nineteenth Edition. The Mc Graw Hill, 2010.

Atenció: Aquestes cites poden no estar 100% correctes.