WELSCH, G. A. Budgeting. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)WELSCH, Glenn A. Budgeting. Prentice-Hall.
Lua MLA (8ú heag.)WELSCH, Glenn A. Budgeting. Prentice-Hall.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.