DRUCKER PETER F. (1992). MANAGING THE NON-PROFIT ORGANISATION. HARPER COLLINS PUBLISHERS.
Lua i Stíl Chicago (17ú heag.)DRUCKER PETER F. MANAGING THE NON-PROFIT ORGANISATION. NEW YORK: HARPER COLLINS PUBLISHERS, 1992.
Lua MLA (9ú heag.)DRUCKER PETER F. MANAGING THE NON-PROFIT ORGANISATION. HARPER COLLINS PUBLISHERS, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.