Callaway, J., & Callaway, J. (2012). Clients first: The two word miracle. Wiley.
Lua i Stíl Chicago (17ú heag.)Callaway, Joseph, agus JoAnn Callaway. Clients First: The Two Word Miracle. Hoboken, N.J.: Wiley, 2012.
Lua MLA (9ú heag.)Callaway, Joseph, agus JoAnn Callaway. Clients First: The Two Word Miracle. Wiley, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.