The Effectiveness of Mindfulness-Based Cognitive Therapy Counseling to Improve the Psychological Capital and Academic Performance of Students with Nomophobia Symptoms at SMP Negeri 1 Arjawinangun - Sholihah, Farhatus; Eddy Wibowo, Mungin; Mulawarman, Mulawarman (Jurnal Bimbingan Konseling, 2023)