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Lua i Stíl Chicago (17ú heag.)Service America: Doing Business in the New Economy. united states of america: Dow Jones-Irwin, 1985.
Lua MLA (9ú heag.)Service America: Doing Business in the New Economy. Dow Jones-Irwin, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.