1 1 50 A.Sonny Keraf Primary Author Otto Gusti Primary Author K.Bertens Primary Author A.A Wattimena Primary Author Rodemeus Ristyantoro Primary Author Kasding Sihotang Primary Author mixed material 08538689 Jakarta Unika Atma Jaya 2011 03ea1fe7-ee9a-45e6-8437-b59d3f848bed.jpg.jpg