Khasanah, Ayu, Anwar Sutoyo, and Eko Nusantoro. “Meningkatkan Motivasi Belajar Siswa Underachiever Melalui Layanan Bimbingan Kelompok”. Indonesian Journal of Guidance and Counseling: Theory and Application 2, no. 3 (September 4, 2013). Accessed April 27, 2024. https://journal.unnes.ac.id/sju/jbk/article/view/3194.