Peran social media dalam membangun brand image guna mempertahankan corporate image (Studi kasus fans page Facebook dan Twitter XL Axiata) = The role of social media to build brand image in term and maintain corporate image (Case study on fans Facebook page and Twitter XL RameL Axiata) - Agrie Pratama, author (Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2012)