Coolidge, S. (1979). What Katy did (Abridged.). Purnell.
Lua i Stíl Chicago (17ú heag.)Coolidge, Susan. What Katy Did. Abridged. London: Purnell, 1979.
Lua MLA (8ú heag.)Coolidge, Susan. What Katy Did. Abridged. Purnell, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.