Ennis, M., & Vincent, C. (1990). Obstetric accidents: A review of 64 cases.
芝加哥风格引文Ennis, M., 与 C. Vincent. Obstetric Accidents: A Review of 64 Cases. 1990.
MLA引文Ennis, M., 与 C. Vincent. Obstetric Accidents: A Review of 64 Cases. 1990.
警告：这些引文格式不一定是100％准确.