Bauer, C. (2011). Sales Mastery. Penguin Books.
Lua i Stíl Chicago (17ú heag.)Bauer, Chuck. Sales Mastery. New Delhi: Penguin Books, 2011.
Lua MLA (9ú heag.)Bauer, Chuck. Sales Mastery. Penguin Books, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.