Fridiarty, Lelly, et al. “Pengaruh Model Pembelajaran Contextual Teaching and Learning (CTL) Terhadap Hasil Belajar Boga Dasar SMK Negeri 3 Tebing Tinggi”. Jurnal Pendidikan Tambusai, vol. 4, no. 3, Dec. 2020, pp. 3558-65, http://jptam.org/index.php/jptam/article/view/1191.