Titus, P., & Willson, J. R. (1961). Management of obstetric difficulties (6th ed.). Mosby.
芝加哥风格引文Titus, Paul, 与 J. Robert Willson. Management of Obstetric Difficulties. 6th ed. St. Louis: Mosby, 1961.
MLA引文Titus, Paul, 与 J. Robert Willson. Management of Obstetric Difficulties. 6th ed. Mosby, 1961.
警告：这些引文格式不一定是100％准确.