POSNER, G. D., & DY, J. (2013). Oxorn- Foote Human Labor & Birth. Mc Grawhill.
芝加哥风格引文POSNER, Glenn D., 与 Jessica DY. Oxorn- Foote Human Labor & Birth. Mc Grawhill, 2013.
MLA引文POSNER, Glenn D., 与 Jessica DY. Oxorn- Foote Human Labor & Birth. Mc Grawhill, 2013.
警告：这些引文格式不一定是100％准确.