Aditianingsih, V., catharina anni, and D. Sugiharto. “Motivasi Berprestasi Siswa Ditinjau Dari Kemampuan Komunikasi Interpersonal Dan Self-Efficacy”. Indonesian Journal of Guidance and Counseling: Theory and Application, Vol. 7, no. 4, Dec. 2018, pp. 59-65, doi:10.15294/ijgc.v7i4.19104.