Long, Q., Zhang, Y., Raven, J., Wu, Z., Bogg, L., Tang, S., & Hemminki, E. (2011). Giving birth at a health-care facility in rural China: Is it affordable for the poor? World Health Organization.

Long, Qian, Yaoguang Zhang, Joanna Raven, Zhuochun Wu, Lennart Bogg, Shenglan Tang, và Elina Hemminki. Giving Birth At a Health-care Facility in Rural China: Is It Affordable for the Poor? World Health Organization, 2011.

Long, Qian, et al. Giving Birth At a Health-care Facility in Rural China: Is It Affordable for the Poor? World Health Organization, 2011.