Sumner, M. (2012). Enterprise Resource Planning. Pearson Education India Pvt. Ltd.
Lua i Stíl Chicago (17ú heag.)Sumner, Mary. Enterprise Resource Planning. New Delhi: Pearson Education India Pvt. Ltd, 2012.
Lua MLA (9ú heag.)Sumner, Mary. Enterprise Resource Planning. Pearson Education India Pvt. Ltd, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.