Dugdale, K., & Lambert, D. (2007). Smarter selling: Next generation sales strategies to meet your buyer's needs, every time. Financial Times Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Dugdale, Keith, agus David Lambert. Smarter Selling: Next Generation Sales Strategies to Meet Your Buyer's Needs, Every Time. Harlow: Financial Times Prentice Hall, 2007.
Lua MLA (8ú heag.)Dugdale, Keith, agus David Lambert. Smarter Selling: Next Generation Sales Strategies to Meet Your Buyer's Needs, Every Time. Financial Times Prentice Hall, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.