STAFFORD L W T. (1981). BUSINESS MATHEMATICS (2ND.). MACDONALD & EVANS.
Lua i Stíl Chicago (17ú heag.)STAFFORD L W T. BUSINESS MATHEMATICS. 2ND. LONDON: MACDONALD & EVANS, 1981.
Lua MLA (9ú heag.)STAFFORD L W T. BUSINESS MATHEMATICS. 2ND. MACDONALD & EVANS, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.