Kurniawan, Nanda Alfan, et al. “Acceptability of Group Guidance Guidelines to Improve Critical Thinking Ability of Vocational School Students”. Nusantara of Research : Jurnal Hasil-Hasil Penelitian Universitas Nusantara PGRI Kediri, vol. 8, no. 1, June 2021, pp. 35-43, https://doi.org/10.29407/nor.v8i1.15866.