Havlena, J. E. (1993). The development of children: Instructor's manual with test items. New York: Freeman and Company.
Παραπομπή Chicago StyleHavlena, June E. The Development of Children: Instructor's Manual With Test Items. New York: Freeman and Company, 1993.
Παραπομπή MLAHavlena, June E. The Development of Children: Instructor's Manual With Test Items. New York: Freeman and Company, 1993.
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