?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Heryanto&rft.au=Heryanto%2C+Harianja&rft.aufirst=Harianja&rft.inst=Universitas+Negeri+Padang&rft.degree=Bachelor%2FSkripsi&rft.date=2012&rft.title=Politeness+Strategies+Used+in+Making+Requests+in+Conversation+Among+Bataknese+Students+of+Padang+State+University+in+Pasir+Parupuk+Padang.