Sumarna DL, Faisal M. Pengukuran dan Perbaikan Kualitas Pelayanan PT Pos Indonesia Menggunakan Metode Importance Performance Analysis (IPA). logistik [Internet]. 2020May28 [cited 2026Sep.23];10(1):52-5. Available from: https://ejurnal.ulbi.ac.id/index.php/logistik/article/view/696