?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Silalahi&rft.aufirst=Rismauli+Maretha&rft.au=Silalahi%2C+Rismauli+Maretha&rft.degree=Master&rft.title=Diffusion+of+Innovation+Process+in+Rural+Infrastructure+Project+(Case+Study+of+Mekar+Sari+Raya+Village%2C+Simalungun+Regency+-+Indonesia&rft.date=2014