Yuliandita, S., and sugiyo sugiyo. “Pengaruh Layanan Bimbingan Kelompok Terhadap Peningkatan Pemahaman Self-Control Siswa”. Indonesian Journal of Guidance and Counseling: Theory and Application, Vol. 5, no. 1, Mar. 2016, doi:10.15294/ijgc.v5i1.12448.