?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Suryana&rft.au=Suryana%2C+Dadan&rft.aufirst=Dadan&rft.title=Implementation+of+Children%E2%80%99s+Numerical+Skill+Learning+Activity+in+Early+Childhood+Education&rft.date=2019&rft.issn=2352-5398&rft.genre=proceeding