HASTA MANDIRI KARYA, PT D.I. Yogyakarta Steam Bathrooms, Susilo, Cieslak Michael. hastamandirikarya@yahoo.co.id, hastakar@indosat.net.id (62-274) 419757 http://www.hastakarya.com/ (62-811) 259358 (62-274) 419757 Jl. Mangkuyudan No. 48, Matrijeron