Della Aulia Putri Ekawati, Dewi Khrisna Sawitri. Analisis Peran Sales Call dalam Meningkatkan Efektivitas Penawaran di Sektor Perhotelan. optimal [Internet]. 2026 Jan. 3 [cited 2026 Jan. 25];6(1):608-22. Available from: https://researchhub.id/index.php/optimal/article/view/9630