Analisis kepastian hukum terhadap objek pajak bumi dan bangunan (studi kasus putusan pengadilan negeri No.53/B/PK/Pjk/2010) = Analysis of legal certainty to objects of land and building tax disputes (case study of district decision No.52/B/PK/Pjk/2010) / Khusnul Asa Tirta Palupy