Scottish Mathematics Group. (1968). Modern mathematics for schools , book 6. Chambers.
Lua i Stíl Chicago (17ú heag.)Scottish Mathematics Group. Modern Mathematics for Schools , Book 6. Glasgow : Blackie ; Edinburgh: Chambers, 1968.
Lua MLA (9ú heag.)Scottish Mathematics Group. Modern Mathematics for Schools , Book 6. Chambers, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.