Drucker,peter.f. (2020). Peter f. drucker on business and Society. Harward business rev press.
Lua i Stíl Chicago (17ú heag.)Drucker,peter.f. Peter F. Drucker on Business and Society. Bostom: Harward business rev press, 2020.
Lua MLA (9ú heag.)Drucker,peter.f. Peter F. Drucker on Business and Society. Harward business rev press, 2020.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.