Brand extensions’ influence on brand image : empirical study on Bodrex’s brand - Rokhman, M. Rifqi; Program Pasca Sarjana Ilmu Farmasi, Fakultas Farmasi Gadjah Mada, Yogyakarta (Faculty of Pharmacy Universitas Gadjah Mada, Yogyakarta, Skip Utara, 55281, Indonesia, 2016)