?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=Mustafa&rft.au=Yoga%2C+Mustafa&rft.aulast=Yoga&rft.date=2018&rft.inst=Universitas+Muhammadiyah+Prof.+Dr.+HAMKA&rft.degree=Bachelor&rft.title=Marketing+Public+Relations+PT+Telkomsel+melalui+digital+word+of+mouth