File:Mules leisurely enjoying the sun and the snow.jpg - Wikimedia Commons
Draft Horses and Mules: Harnessing Equine Power for Farm & Show (Storey's Working Animals) - Kindle edition by Damerow, Gail, Rice, Alina. Crafts, Hobbies & Home Kindle eBooks @ Amazon.com.
Mules Animal – All About These Reliable Pack Animals!
Mules rule: Spectators at Larimer County Fair enjoy long-ears – Loveland Reporter-Herald