?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Dirga&rft.aufirst=Alan+Kusuma&rft.au=Dirga%2C+Alan+Kusuma&rft.inst=Universitas+Muhammadiyah+Prof.+DR.+HAMKA&rft.degree=Bachelor&rft.date=2018&rft.title=Hubungan+pengetahuan%2C+sikap+dan+persepsi+pada+pekerja+terhadap+pe+rilaku+keselamatan+berkendara+(safety+riding)+di+PT.+Pinus+Merah+Abadi+tahun+2018.