?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=El+Andri&rft.aulast=Iksan&rft.au=Iksan%2C+El+Andri&rft.inst=Universitas+Negeri+Padang&rft.title=Pengaruh+Latihan+Kekuatan+Otot+Perut+terhadap+Kemampuan+Heading+Pemain+Sepak+Bola+di+SSB+Puncak+Andalas+Kerinci&rft.degree=Bachelor%2FSkripsi&rft.date=March+2019