MM. (1992). Retailing. College Division South Western.
Lua i Stíl Chicago (17ú heag.)MM. Retailing. College Division South Western, 1992.
Lua MLA (8ú heag.)MM. Retailing. College Division South Western, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.