@phdthesis{UNY502,
            year = {2011},
           title = {STUDI KOMPARASI BUDIDAYA BURUNG WALET DI KECAMATAN SINGKAWANG TENGAH DAN KECAMATAN SINGKAWANG SELATAN},
          author = {- Diter William},
          school = {UNY},
             url = {http://eprints.uny.ac.id/502/}
}