Produksi ruang "ngamen" pada ruang publik kota (studi kasus Gelora Bung Karno dan GKI Kayu Putih Jakarta) = Production of spaces for "ngamen" in urban public area with (case studies in the Gelora Bung Karno and GKI Kayu Putih Jakarta) - Simanjuntak, Aprian Waratorang., author (2014)