APA (7th ed.) Citation

Zhang, X., Chen, M., Cao, G., & Hu, G. Determination of Morphine and Codeine in Human Urine by Gas Chromatography-Mass Spectrometry. Wiley.

Chicago Style (17th ed.) Citation

Zhang, Xiaoqian, Mengchun Chen, Gaozhong Cao, and Guoxin Hu. Determination of Morphine and Codeine in Human Urine by Gas Chromatography-Mass Spectrometry. Wiley.

MLA (9th ed.) Citation

Zhang, Xiaoqian, et al. Determination of Morphine and Codeine in Human Urine by Gas Chromatography-Mass Spectrometry. Wiley.