Sapulette, Ludy. “PENGARUH MOTIVASI EKSTERNAL DAN INTERNAL TERHADAP PRODUKTIVITAS KERJA KARYAWAN PDAM AMBON”. Arthavidya Jurnal Ilmiah Ekonomi 17, no. 1 (August 14, 2017): 72 - 83. Accessed December 5, 2024. https://arthavidya.wisnuwardhana.ac.id/index.php/arthavidya/article/view/25.