Não informado. (2014). Investigations in Mathematics Learning. Research Council on Mathematics Learning.
Lua i Stíl Chicago (17ú heag.)Não informado. Investigations in Mathematics Learning. Memphis, Tenn: Research Council on Mathematics Learning, 2014.
Lua MLA (8ú heag.)Não informado. Investigations in Mathematics Learning. Research Council on Mathematics Learning, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.