Harlan, J. D. (1976). Science experimences for the early childhood years. Charles E. Merrill Publ.
Čikaški stil citiranja (17. izdanje)Harlan, Jean Durgin. Science Experimences for the Early Childhood Years. Charles E. Merrill Publ, 1976.
MLA način citiranja (8. izdanje)Harlan, Jean Durgin. Science Experimences for the Early Childhood Years. Charles E. Merrill Publ, 1976.
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