Vag, Otto (March 1975). "The Influence of the English Infant School in Hungary". International Journal of Early Childhood. 7 (1): 132–136. doi:10.1007/bf03175934. S2CID145709106.
Vag, Otto (March 1975). "The Influence of the English Infant School in Hungary". International Journal of Early Childhood. 7 (1): 132–136. doi:10.1007/bf03175934. S2CID145709106.