@unpublished{ITNYREPOID3320,
       publisher = {ITNY},
           title = {Similarity: Stable Isotopes Changes In Groundwater Case Study In Mudal And Clapar Springs, West Progo},
          author = {Listiyani Retno Astuti},
             url = {https://repository.itny.ac.id/id/eprint/3320/}
}