?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=Ramen+A&rft.aulast=Purba&rft.au=Ramen+A+Purba&rft.date=2022&rft.btitle=Konsep+Dasar+Sistem+Informasi+dalam+Dunia+Usaha&rft.isbn=978-623-342-478-3&rft.genre=book