Blackman ,Jeff. (2003). Stop whining start selling. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)Blackman ,Jeff. Stop Whining Start Selling. John Wiley & Sons, 2003.
Lua MLA (9ú heag.)Blackman ,Jeff. Stop Whining Start Selling. John Wiley & Sons, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.