Primadina, N. et al. 2025. The Effect of Aetoxylon sympetalum Essential Oil Treatment on Focus Endurance Level of First-Year Medical Students. Qanun Medika - Medical Journal Faculty of Medicine Muhammadiyah Surabaya. 9, 01 (Jan. 2025). DOI:https://doi.org/10.30651/jqm.v9i01.23675.