SIM,ROJIKIN,PROF.DR.IR.HAPZI ALI,MM,CMA,SISTEM POINT OF SALES PADA PERUSAHAAN,MERCUBUANA,2017 SIM,ROJIKIN,PROF.DR.IR.HAPZI ALI,MM,CMA,TELEKOMUNIKASI,INTERNET,& TEKNOLOGI NIRKABEL,MERCUBUANA,2017 Sim.rojikin.prof.dr.ir.hapzi ali,mm,cma.customer relationship management.universitas mercu buana 2017.