Goddard, H. C. The turn of the screw: Harold C. Goddard. Critics on Henry James.(1974).
Lua i Stíl Chicago (17ú heag.)Goddard, Harold C. "The Turn of the Screw: Harold C. Goddard." Critics on Henry James.(1974) .
Lua MLA (8ú heag.)Goddard, Harold C. "The Turn of the Screw: Harold C. Goddard." Critics on Henry James.(1974), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.