APIAH, N.; MULYADI; SUDIANTO. Pengaruh Disiplin Kerja, Lingkungan dan Motivasi Kerja terhadap Kinerja Karyawan pada PT. Caltest Engineers Batam. Surplus: Jurnal Ekonomi dan Bisnis, [S. l.], v. 4, n. 2, p. 379–392, 2026. DOI: 10.71456/sur.v4i2.1681. Disponível em: https://yptb.org/index.php/sur/article/view/1681. Acesso em: 8 oct. 2026.