Cushman, K. (1994). Catherine, called Birdy. Harper Trophy.
Lua i Stíl Chicago (17ú heag.)Cushman, Karen. Catherine, Called Birdy. New York: Harper Trophy, 1994.
Lua MLA (9ú heag.)Cushman, Karen. Catherine, Called Birdy. Harper Trophy, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.