ADAMS TONY. (1989). SECRETS OF SUCCESSFUL SALES MANAGEMENT: HOW TO BE A BETTER SALES MANAGER. HEINEMANN.
Lua i Stíl Chicago (17ú heag.)ADAMS TONY. SECRETS OF SUCCESSFUL SALES MANAGEMENT: HOW TO BE A BETTER SALES MANAGER. LONDON: HEINEMANN, 1989.
Lua MLA (9ú heag.)ADAMS TONY. SECRETS OF SUCCESSFUL SALES MANAGEMENT: HOW TO BE A BETTER SALES MANAGER. HEINEMANN, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.