Purwana, Krisdanu, Kusnadi, and Salma Nandilla. “Pengaruh Standar Operasional Prosedur (SOP) Dan Lingkungan Kerja Fisik Terhadap Kinerja Karyawan (Survei Pada Customer Service PT. Jasamarga Tollroad Operator Ruas Tol Jakarta-Cikampek)”. Jurnal Bisnis 14, no. 1 (August 18, 2026): 167–183. Accessed August 18, 2026. https://jurnal.stieb-perdanamandiri.ac.id/index.php/ilejurnalojs/article/view/174.