APA (7e ed.) Bronvermelding

Samuelson, P. A. &. o. (2010). Economics - 19th Edition. Tata Mc Graw Hill Education Pvt. Ltd.

Chicago (17e ed.) Bronvermelding

Samuelson, Paul A. & others. Economics - 19th Edition. New Delhi: Tata Mc Graw Hill Education Pvt. Ltd, 2010.

MLA (9e ed.) Bronvermelding

Samuelson, Paul A. & others. Economics - 19th Edition. Tata Mc Graw Hill Education Pvt. Ltd, 2010.