Nickels, W. G. (1987). Understanding Business. Times Mirror.
Lua i Stíl Chicago (17ú heag.)Nickels, William G. Understanding Business. ST.Louis: Times Mirror, 1987.
Lua MLA (9ú heag.)Nickels, William G. Understanding Business. Times Mirror, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.