WebMD. https://www.webmd.com/brain/concussion-traumatic-brain-injury-symptoms-causes-treatments#1
Diakses pada Oktober 2018Headway. https://www.headway.org.uk/about-brain-injury/individuals/types-of-brain-injury/minor-head-injury-and-concussion/
Diakses pada 17 Desember 2020