Köster, K. (2011). International Project Management. SAGE Publications India Pvt. Ltd.
Lua i Stíl Chicago (17ú heag.)Köster, Kathrin. International Project Management. New Delhi: SAGE Publications India Pvt. Ltd, 2011.
Lua MLA (9ú heag.)Köster, Kathrin. International Project Management. SAGE Publications India Pvt. Ltd, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.