Belle Cottingham. (2021). Cambridge Lower SEcondary Maths Stage 8: Teacher's Guide. Collins.
Lua i Stíl Chicago (17ú heag.)Belle Cottingham. Cambridge Lower SEcondary Maths Stage 8: Teacher's Guide. London: Collins, 2021.
Lua MLA (9ú heag.)Belle Cottingham. Cambridge Lower SEcondary Maths Stage 8: Teacher's Guide. Collins, 2021.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.