CAMPBELL, D. (1993). Quick Books For Profit. Osborne McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)CAMPBELL, David. Quick Books For Profit. Osborne McGraw-Hill, 1993.
Lua MLA (8ú heag.)CAMPBELL, David. Quick Books For Profit. Osborne McGraw-Hill, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.