(1968). Retail salesmanship.
Lua i Stíl Chicago (17ú heag.)Retail Salesmanship. 1968.
Lua MLA (9ú heag.)Retail Salesmanship. 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)