ANSTIS R D. (1978). PRACTICAL BUSINESS EDUCATION. MACDONALD & EVANS.
Lua i Stíl Chicago (17ú heag.)ANSTIS R D. PRACTICAL BUSINESS EDUCATION. GREAT BRITAIN: MACDONALD & EVANS, 1978.
Lua MLA (9ú heag.)ANSTIS R D. PRACTICAL BUSINESS EDUCATION. MACDONALD & EVANS, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.