APA引文

Crawford, J. S. (1978). Principles and practice of obstetric anesthesia (4. ed.). Blackwell Scientific Publications.

Citação norma Chicago

Crawford, J. S. Principles and Practice of Obstetric Anesthesia. 4. ed. Blackwell Scientific Publications, 1978.

MLA引文

Crawford, J. S. Principles and Practice of Obstetric Anesthesia. 4. ed. Blackwell Scientific Publications, 1978.

警告：這些引文格式不一定是100％准確.