Allen, D. (2001). Getting Things Done. Penguin Books.
Lua i Stíl Chicago (17ú heag.)Allen, David. Getting Things Done. New Delhi: Penguin Books, 2001.
Lua MLA (9ú heag.)Allen, David. Getting Things Done. Penguin Books, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.