SUBCHAN, .; SAFIRIN, . T. Analisis Kualitas Layanan Aplikasi Ruangguru dengan E-Servqual dan Net Promoter Score (NPS). Limits: Journal of Mathematics and Its Applications, [S. l.], v. 22, n. 2, p. 125–134, 2025. DOI: 10.12962/limits.v22i2.4364. Disponível em: https://journal.its.ac.id/index.php/limits/article/view/4364. Acesso em: 18 dec. 2025.