Ward, R. (2012). Numbers. Ufuk.
Lua i Stíl Chicago (17ú heag.)Ward, Rachel. Numbers. Ufuk, 2012.
Lua MLA (8ú heag.)Ward, Rachel. Numbers. Ufuk, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)