Hesseling, P. G. M. (1982). Effective organization research for development. Pergamon Press.
Lua i Stíl Chicago (17ú heag.)Hesseling, P. G. M. Effective Organization Research for Development. Oxford, [Oxfordshire] ; New York: Pergamon Press, 1982.
Lua MLA (8ú heag.)Hesseling, P. G. M. Effective Organization Research for Development. Pergamon Press, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.