Williams, G. (1996). Unusual connections: Maths through investigations. Gaye Williams Publications.
Lua i Stíl Chicago (17ú heag.)Williams, Gaye. Unusual Connections: Maths Through Investigations. Brighton, Vic: Gaye Williams Publications, 1996.
Lua MLA (9ú heag.)Williams, Gaye. Unusual Connections: Maths Through Investigations. Gaye Williams Publications, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.