APA (7th ed.) Citation

Liu, M., Chang, Y., Wang, D., Fang, J., Carson, S., Li, B., . . . Huang, K. Validation of the patient health questionnaire (PHQ)-9 and PHQ-2 in patients with COPD in China. BMC.

Chicago Style (17th ed.) Citation

Liu, Meishan, Yuhan Chang, Dong Wang, Jiexin Fang, Shannon Carson, Boyu Li, Yongdong Hu, and Kewu Huang. Validation of the Patient Health Questionnaire (PHQ)-9 and PHQ-2 in Patients with COPD in China. BMC.

MLA (9th ed.) Citation

Liu, Meishan, et al. Validation of the Patient Health Questionnaire (PHQ)-9 and PHQ-2 in Patients with COPD in China. BMC.