15987 1279 10 Muhammad Hagi Primary Author 1255301039 Additional Author mixed material Pustaka Politeknik Caltex Riau 2016 Cici Patmala Primary Author 1255301016 Additional Author mixed material Pustaka Politeknik Caltex Riau 2016 Boby Putera Primary Author 1255301012 Additional Author mixed material Pustaka Politeknik Caltex Riau 2016 Andi Prasetia Primary Author 1255301004 Additional Author mixed material Pustaka Politeknik Caltex Riau 2016 Nella Desnizar Primary Author 1255301040 Additional Author mixed material Pustaka Politeknik Caltex Riau 2016 Muhammad Hafiz Primary Author 1255301038 Additional Author mixed material Pustaka Politeknik Caltex Riau 2016 Ario Kresna Primary Author 1255301008 Additional Author mixed material Pustaka Politeknik Caltex Riau 2016 Jeffry Antonius Primary Author 1255301030 Additional Author mixed material Pustaka Politeknik Caltex Riau 2016 Widya Alfitrah Wardanie Primary Author 1255301063 Additional Author mixed material Pustaka Politeknik Caltex Riau 2016 Sepryadi Nirwan Primary Author 1255301054 Additional Author mixed material Pustaka Politeknik Caltex Riau 2016