Lavatelli, Celia Stendler Piaget's theory applied to an early childhood curriculum / Celia Stendler Lavatelli. - 2a ed. - Boston [E.U.A.] : Center for Media Development, 1973. - 163 p. : il. Encabezamiento--Nombre Personal: Piaget, Jean, 1896-1980 --Crítica e interpretación