Peralihan hak dalam perjanjian pengikatan jual beli tanah yang telah lunas (analisis putusan Pengadilan Tinggi Jakarta Nomor 307/PDT/2010/PT.DKI) = The transfer of rights in conditional sale and purchase of land agreement which has been paid (analysis of the Jakarta high court's verdict Number 307/PDT/2010/PT. DKI)