HARLOW, R. A. M. (1999). YOUNG DISCOVERERS ENERGY AND POWER ENVIRONMENTAL FACTS AND EXPERIMENTS.
Čikaški stil citiranja (17. izdanje)HARLOW, ROSIE AND MORGAN. YOUNG DISCOVERERS ENERGY AND POWER ENVIRONMENTAL FACTS AND EXPERIMENTS. 1999.
MLA način citiranja (9. izdanje)HARLOW, ROSIE AND MORGAN. YOUNG DISCOVERERS ENERGY AND POWER ENVIRONMENTAL FACTS AND EXPERIMENTS. 1999.
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