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APA Citation
Al-sheyab, N. A., Khader, Y. S., Shah, S., Roydhouse, J. K., & Gallagher, R. (2018). the Effect of a "Class Smoke Free Pledge" on Breath Carbon Monoxide in Arabic Male Adolescents. Nicotine & tobacco research, 20(5), 568–574. http://access.bl.uk/ark:/81055/vdc_100095508155.0x000020