Essa, E. (1999). Introduction to early childhood education (3rd ed.). Delmar.
Chicago-viite (17. p.)Essa, Eva. Introduction to Early Childhood Education. 3rd ed. Albany, N.Y: Delmar, 1999.
MLA-viite (9. p.)Essa, Eva. Introduction to Early Childhood Education. 3rd ed. Delmar, 1999.
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