Lingard, J. (1992). Tug of war. Puffin Books.
Lua i Stíl Chicago (17ú heag.)Lingard, Joan. Tug of War. New York: Puffin Books, 1992.
Lua MLA (9ú heag.)Lingard, Joan. Tug of War. Puffin Books, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.