APA
Zhao J., Li X., Stewart S. L., Gao W., Qi F., Zhang L., Pang Z., Qiao Q., Ning F. & Tong E. (20200423). Cigarette Smoking and Secondhand Smoke Exposure Before and After a Tobacco-Free Olympic Policy Period: Qingdao, China. : Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco.
Chicago
Zhao Jing, Li Xiaojing, Stewart Susan LeRoy, Gao Weiguo, Qi Fei, Zhang Lei, Pang Zengchang, Qiao Qing, Ning Feng and Tong Elisa. 20200423. Cigarette Smoking and Secondhand Smoke Exposure Before and After a Tobacco-Free Olympic Policy Period: Qingdao, China. : Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco.
Harvard
Zhao J., Li X., Stewart S. L., Gao W., Qi F., Zhang L., Pang Z., Qiao Q., Ning F. and Tong E. (20200423). Cigarette Smoking and Secondhand Smoke Exposure Before and After a Tobacco-Free Olympic Policy Period: Qingdao, China. : Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco.
MLA
Zhao Jing, Li Xiaojing, Stewart Susan LeRoy, Gao Weiguo, Qi Fei, Zhang Lei, Pang Zengchang, Qiao Qing, Ning Feng and Tong Elisa. Cigarette Smoking and Secondhand Smoke Exposure Before and After a Tobacco-Free Olympic Policy Period: Qingdao, China. : Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco. 20200423.