Knight, W. A. (1949). The sign of a child: A story for Christmastide. W.A. Wilde Co..
Lua i Stíl Chicago (17ú heag.)Knight, William Allen. The Sign of a Child: A Story for Christmastide. Boston: W.A. Wilde Co., 1949.
Lua MLA (8ú heag.)Knight, William Allen. The Sign of a Child: A Story for Christmastide. W.A. Wilde Co., 1949.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.