APA (7e ed.) Bronvermelding

Samuelson, P. A., Nordhaus, W. D., Chaudhuri, S., & Sen, A. (2020). Economics (20th ed.). McGraw Hill Education (India) Pvt. Ltd.

Chicago (17e ed.) Bronvermelding

Samuelson, Paul A., William D. Nordhaus, Sudip Chaudhuri, en Anindya Sen. Economics. 20th ed. New Delhi: McGraw Hill Education (India) Pvt. Ltd, 2020.

MLA (9e ed.) Bronvermelding

Samuelson, Paul A., et al. Economics. 20th ed. McGraw Hill Education (India) Pvt. Ltd, 2020.