APA引文

HOFFMAN, B. L. (2011). Williams Obstetrics Study Guide. Mc Graw- hill.

Chicago Style (17th ed.) Citation

HOFFMAN, Barbara L. Williams Obstetrics Study Guide. Mc Graw- hill, 2011.

MLA引文

HOFFMAN, Barbara L. Williams Obstetrics Study Guide. Mc Graw- hill, 2011.

警告：這些引文格式不一定是100％准確.