Citação norma APA

Liu, J., Qu, B., C, E. M., Zhang, Y., & Liang, S. (2013). Factors associated with HIV infection among men who have sex with men in Henan Province, China: A cross-sectional study. BioMed Central.

Citação norma Chicago

Liu, Jie, Bo Qu, Ezeakile Moses C, Yang Zhang, and Shijie Liang. Factors Associated With HIV Infection Among Men Who Have Sex With Men in Henan Province, China: A Cross-sectional Study. BioMed Central, 2013.

Citação norma MLA

Liu, Jie, et al. Factors Associated With HIV Infection Among Men Who Have Sex With Men in Henan Province, China: A Cross-sectional Study. BioMed Central, 2013.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.