Purwanto, Eko, Soepeno ., and M. Azis Firdaus. “‘PENGARUH PELATIHAN TERHADAP PRODUKTIVITAS KERJA PETUGAS LAYANAN JALAN TOL PT JASA MARGA (PERSERO) Tbk CABANG JAGORAWI’”. inovator 2, no. 1 (March 10, 2013). Accessed June 2, 2026. http://150.107.142.43/index.php/INOVATOR/article/view/670.