“Distance, Smoking Habits, and Carboxyhemoglobin Levels in Male Students: Jarak, Kebiasaan Merokok, Dan Tingkat Karboksihemoglobin Pada Mahasiswa Laki-Laki”. 2025. Indonesian Journal on Health Science and Medicine 2 (2): 10.21070/ijhsm.v2i2.274. https://doi.org/10.21070/ijhsm.v2i2.274.