(2014). Help your kids with math: A unique step-by-step visual guide (Rev. and updated new edition.). DK Publishing.
Cita Chicago Style (17a ed.)Help Your Kids with Math: A Unique Step-by-step Visual Guide. Rev. and updated new edition. New York: DK Publishing, 2014.
Cita MLA (8a ed.)Help Your Kids with Math: A Unique Step-by-step Visual Guide. Rev. and updated new edition. DK Publishing, 2014.
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