Khairina, M. 2019. The Description of CO Levels, COHb Levels, And Blood Pressure of Basement Workers X Shopping Centre, Malang. JURNAL KESEHATAN LINGKUNGAN . 11, 2 (Apr. 2019), 150–157. DOI:https://doi.org/10.20473/jkl.v11i2.2019.150-157.