Levitt, S. (1982). Treatment of cerebral palsy and motor delay (2nd ed.). Blackwell Scientific Pub.
Lua i Stíl Chicago (17ú heag.)Levitt, Sophie. Treatment of Cerebral Palsy and Motor Delay. 2nd ed. Oxford: Blackwell Scientific Pub, 1982.
Lua MLA (9ú heag.)Levitt, Sophie. Treatment of Cerebral Palsy and Motor Delay. 2nd ed. Blackwell Scientific Pub, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.