Tessalonika, Regita C., Frendy A. O. Pelleng, and Sandra Asaloei. 2021. “Pengaruh Efisiensi Kerja Terhadap Kinerja Karyawan PT. Aneka Gas Industri Bitung”. Productivity 2 (5):413-16. https://ejournal.unsrat.ac.id/v3/index.php/productivity/article/view/36115.