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Lua i Stíl Chicago (17ú heag.)Methods and Techniques of Business Forecasting. Englewood Cliffs, New Jersey: Prentice-Hall, Inc, 1973.
Lua MLA (9ú heag.)Methods and Techniques of Business Forecasting. Prentice-Hall, Inc, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.