Paul, J. (2019). Business Environment (4th.). Mc Graw Hill.
Lua i Stíl Chicago (17ú heag.)Paul, Justin. Business Environment. 4th. Mc Graw Hill, 2019.
Lua MLA (9ú heag.)Paul, Justin. Business Environment. 4th. Mc Graw Hill, 2019.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.