Nielsen, J. U. (1995). International economics: The wealth of open nations. .McGraw-Hill Book Co.
Citazione stile Chigago Style (17a edizione)Nielsen, Jorgen Ulff-Moller. International Economics: The Wealth of Open Nations. London ; New York: .McGraw-Hill Book Co, 1995.
Citatione MLA (9a ed.)Nielsen, Jorgen Ulff-Moller. International Economics: The Wealth of Open Nations. .McGraw-Hill Book Co, 1995.