APA aipamena

Cao, Y., Yan, X., Ma, X., Wang, R., Johansson, S., Wallander, M., & He, J. (2008). Validation of a survey methodology for gastroesophageal reflux disease in China. BioMed Central.

Chicago Style aipamena

Cao, Yang, Xiaoyan Yan, Xiu-Qiang Ma, Rui Wang, Saga Johansson, Mari-Ann Wallander, and Jia He. Validation of a Survey Methodology for Gastroesophageal Reflux Disease in China. BioMed Central, 2008.

MLA aipamena

Cao, Yang, et al. Validation of a Survey Methodology for Gastroesophageal Reflux Disease in China. BioMed Central, 2008.