School Mathematics Project. (1970). SMP Book A. The University Press.
Lua i Stíl Chicago (17ú heag.)School Mathematics Project. SMP Book A. Cambridge: The University Press, 1970.
Lua MLA (9ú heag.)School Mathematics Project. SMP Book A. The University Press, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.