KARYA WISESA, CV North Sumatera Doors of Wood, Darma Sakti Sagala, Lili. karya_wisesa@ymail.com (62-61) 4559949, 4539966 www.karyawisesa.com (62-812) 6559666 (62-61) 4576046 Jl. Tuba IV. Gg. Balmera No. 2-A/3