APA引文

Johnston, J. (2008). When are chest X-ray scans performed in the emergency department useful? BioMed Central.

Citação norma Chicago

Johnston, JE. When Are Chest X-ray Scans Performed in the Emergency Department Useful? BioMed Central, 2008.

MLA引文

Johnston, JE. When Are Chest X-ray Scans Performed in the Emergency Department Useful? BioMed Central, 2008.

警告：這些引文格式不一定是100％准確.