Strategi komunikasi Presiden dengan rakyat melalui PO BOX & SMS 9949 : studi kasus komunikasi politik Presiden SBY = The communication strategy of the president to the people's through PO BOX & SMS 9949 : case study of the political communication President SBY / Harahap, Haswan Boris Muda - Harahap, Haswan Boris Muda, author (2013)