Drucker, P. (1989). The new realities. Mandorin.
Lua i Stíl Chicago (17ú heag.)Drucker, Peter. The New Realities. London: Mandorin, 1989.
Lua MLA (9ú heag.)Drucker, Peter. The New Realities. Mandorin, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.