David Greenaway. International Trade Policy (Latest edition.). Macmillan.
Lua i Stíl Chicago (17ú heag.)David Greenaway. International Trade Policy. Latest edition. Macmillan.
Lua MLA (8ú heag.)David Greenaway. International Trade Policy. Latest edition. Macmillan.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.