APA (7th ed.) Zitazioa

Friedrich, K. (1974). International economics: Concepts and issues. McGraw-Hill.

Chicago Style (17th ed.) Zitazioa

Friedrich, Klaus. International Economics: Concepts and Issues. New York: McGraw-Hill, 1974.

MLA (9th ed.) Zitazioa

Friedrich, Klaus. International Economics: Concepts and Issues. McGraw-Hill, 1974.