American Endurance Ride Conference (November 2003). "Chapter 3, Section IV: Size". Endurance Rider's Handbook. AERC. Archived from the original on 2008-05-15. Retrieved 2008-08-07.
American Endurance Ride Conference (November 2003). "Chapter 3, Section IV: Size". Endurance Rider's Handbook. AERC. Archived from the original on 2008-05-15. Retrieved 2008-08-07.