Barrieta, E. J. (1975). Mathematical competencies of grade one entrants.
Cita Chicago (17th ed.)Barrieta, Estela J. Mathematical Competencies of Grade One Entrants. 1975.
Cita MLA (9th ed.)Barrieta, Estela J. Mathematical Competencies of Grade One Entrants. 1975.
Atenció: Aquestes cites poden no estar 100% correctes.