Bird, A. (2000). Thomas Kuhn. Acumen.
Lua i Stíl Chicago (17ú heag.)Bird, Alexander. Thomas Kuhn. Chesham: Acumen, 2000.
Lua MLA (9ú heag.)Bird, Alexander. Thomas Kuhn. Acumen, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.