?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Wati&rft.au=Wati+Sukmawati%2C+Wati&rft.aulast=Wati+Sukmawati&rft.atitle=Development+of+items+in+Acid-Base+Identification+Experiments+Using+Natural+Materials%3A+Validity+Test+with+Rasch+Model+Analysis&rft.title=uin+walisongo&rft.genre=article