US Centers for Disease Control and Prevention
https://www.cdc.gov/headsup/parents/
McMaster University / CanChild
https://canchild.ca/en/resources/249-concussion-mild-traumatic-brain-injury-guideline-brochures
National Football League
https://www.nfl.com/playerhealthandsafety/resources/fact-sheets/nfl-head-neck-and-spine-committee-s-concussion-diagnosis-and-management-protocol
Parachute
https://parachute.ca/en/professional-resource/concussion-collection/concussion-protocol-resources-for-sport-organizations/
Centers for Disease Control and Prevention - US CDC
https://www.cdc.gov/headsup/resources/playbook.html
Hockey Canada
https://www.hockeycanada.ca/en-ca/hockey-programs/safety/concussions/facts-and-prevention
National Coaching Certification Program
http://www.coach.ca/-p153487
Ontario Ministry of Tourism, Culture and Sport
http://www.mtc.gov.on.ca/en/sport/rowan_committee_report.shtml
Parachute
https://parachute.ca/en/professional-resources/statement-on-concussion-baseline-testing-in-canada/
Parachute
https://parachute.ca/en/professional-resource/concussion-collection/canadian-guideline-on-concussion-in-sport/