Erwan Nurhidayat. “Perbedaan Harapan Pelanggan Persepsi Dimensi Kualitas Layanan Di Pecel Solo Restaurant”. E-Bisnis : Jurnal Ilmiah Ekonomi Dan Bisnis, vol. 12, no. 2, Dec. 2019, pp. 35-42, https://journal.stekom.ac.id/index.php/Bisnis/article/view/218.