Analisis hukum perlindungan konsumen terhadap hak penumpang bus reguler : studi kasus pencabutan izin trayek bus reguler sebagai akibat pengoperasian bus transjakarta koridor IX dan X = Analysis of the consumer protection law on rights of regular bus passengers : case study for the revocation of regular bus route permit as a result of operation the corridor IX and X transjakarta buses (Fakultas Hukum Universitas Indonesia, 2011)