Lua APA (7ú heag.)

Samuelson, P. A., & Nordhaus, W. D. C. (2021). Economics (20th.). McGraw Hill Education.

Lua i Stíl Chicago (17ú heag.)

Samuelson, Paul A., agus William D; Chaudhuri Nordhaus. Economics. 20th. New Delhi: McGraw Hill Education, 2021.

Lua MLA (9ú heag.)

Samuelson, Paul A., agus William D; Chaudhuri Nordhaus. Economics. 20th. McGraw Hill Education, 2021.

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