GOLDMANN HEINZ M. (1993). HOW TO WIN CUSTOMERS. PAN BOOKS LTD.
Lua i Stíl Chicago (17ú heag.)GOLDMANN HEINZ M. HOW TO WIN CUSTOMERS. LONDON: PAN BOOKS LTD, 1993.
Lua MLA (9ú heag.)GOLDMANN HEINZ M. HOW TO WIN CUSTOMERS. PAN BOOKS LTD, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.