Lua APA (7ú heag.)

Barrieta, E. J. (1975). Mathematical competencies of grade one entrants.

Lua i Stíl Chicago (17ú heag.)

Barrieta, Estela J. Mathematical Competencies of Grade One Entrants. 1975.

Lua MLA (9ú heag.)

Barrieta, Estela J. Mathematical Competencies of Grade One Entrants. 1975.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.