DiFillippo, S. (2013). It's all about the guest: Exceeding expectations in business and in life, the Davio's way. Lyons Press.
Lua i Stíl Chicago (17ú heag.)DiFillippo, Steve. It's All About the Guest: Exceeding Expectations in Business and in Life, the Davio's Way. Guilford, Connecticut: Lyons Press, 2013.
Lua MLA (8ú heag.)DiFillippo, Steve. It's All About the Guest: Exceeding Expectations in Business and in Life, the Davio's Way. Lyons Press, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.