Appleyard, D. R. (2008). International economics Dennis R. Appleyard, Alfred J. Field,JR., Steven L. Cobb. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Appleyard, Dennis R. International Economics Dennis R. Appleyard, Alfred J. Field,JR., Steven L. Cobb. McGraw-Hill, 2008.
Lua MLA (8ú heag.)Appleyard, Dennis R. International Economics Dennis R. Appleyard, Alfred J. Field,JR., Steven L. Cobb. McGraw-Hill, 2008.
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