Cunningham, F. G. (2011). Williams Obstetricia (23.ed.). Mc Graw Hill.
芝加哥风格引文Cunningham, F. Gary. Williams Obstetricia. 23.ed. Mexico: Mc Graw Hill, 2011.
MLA引文Cunningham, F. Gary. Williams Obstetricia. 23.ed. Mc Graw Hill, 2011.
警告：这些引文格式不一定是100％准确.