Aisyatirradiyah S, Samsul Hakim, Alfan Hadi. The Effect of Breakfast on Student Concentration . EJPGMI [Internet]. 2024 Oct. 30 [cited 2026 May 14];3(2):248-5. Available from: https://ejournal.staialamin.ac.id/index.php/pgmi/article/view/228