Kurniawan, I., M. Rachman, and E. Purwanto. “Improving Student’s Attitude of Nationalism Through Group Counselling Based on 3M Lickona”. Jurnal Bimbingan Konseling, Vol. 8, no. 2, Jan. 2019, pp. 151-5, https://journal.unnes.ac.id/sju/jubk/article/view/28175.