Dowling, K. N. (2008). SAP Project System Handbook. Tata McGraw Hill Publishing Company Ltd.
Lua i Stíl Chicago (17ú heag.)Dowling, Kieron N. SAP Project System Handbook. New Delhi: Tata McGraw Hill Publishing Company Ltd, 2008.
Lua MLA (9ú heag.)Dowling, Kieron N. SAP Project System Handbook. Tata McGraw Hill Publishing Company Ltd, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.