ROBINSON, S. (1989). Midwifes, research and childbrith.volome 1. Business Media.
芝加哥风格引文ROBINSON, Sarah. Midwifes, Research and Childbrith.volome 1. Business Media, 1989.
MLA引文ROBINSON, Sarah. Midwifes, Research and Childbrith.volome 1. Business Media, 1989.
警告：这些引文格式不一定是100％准确.