Lestari L. The Influence Of Emotional Value, Functional Value, And Social Value On Customer Retention Among Smartfren Service Users In Lhokseumawe City, Aceh Province. JCII [Internet]. 2026 May 4 [cited 2026 Jun. 22];5(1):52-67. Available from: https://journal.uinsuna.ac.id/index.php/JCII/article/view/7578