RANCANG BANGUN SALES FORCE AUTOMATION BERBASIS ANDROID DI PT. X - Fanrensen, Glenda Sogo; Program Studi Teknik Informatika Fakultas Teknologi Industri Universitas Kristen Petra Jl. Siwalankerto 121-131 Surabaya 60236 Telp. (031) 2983455, Fax. (031) 8417658 (Institute of Research and Community Outreach - Petra Christian University, 2014)