Hirschfeld, R. (1995). The Kids' science book: Creative experiences for hands-on fun. Williamson Pub.
Čikaški stil citiranja (17. izdanje)Hirschfeld, Robert. The Kids' Science Book: Creative Experiences for Hands-on Fun. Charlotte, Vt: Williamson Pub, 1995.
MLA način citiranja (9. izdanje)Hirschfeld, Robert. The Kids' Science Book: Creative Experiences for Hands-on Fun. Williamson Pub, 1995.
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