?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Jefri&rft.aulast=Naldi&rft.au=Naldi%2C+Jefri&rft.atitle=Historical+Insight+and+Characteristic+Culture+Value+of+Historical+Tour+Guide+in+Japanese+Tunnel+Tourism+Object&rft.date=June+2019&rft.issn=print+%3A+2655-5085+dan+online+%3A+2655-5239&rft.title=Science+and+Environmental+Journals+for+Postgraduate&rft.volume=1&rft.issue=2&rft.pages=61-68&rft.genre=article