Nugroho, I., A. Mulyana, and H. Nuraini. “The Effect of Observational Learning towards Students’ Writing Skill”. Foremost Journal (Foreign Language Models, Studies, and Research Publication), vol. 3, no. 1, Feb. 2022, pp. 68-73, https://ejournal.unis.ac.id/index.php/Foremost/article/view/2368.