1. A Wing and a Prayer: Birds and Their Protection Under Law
2. Avian Welfare Coalition Animal Protection Institute American Society for the Prevention of Cruelty to Animals(2009)Captive Exotic Bird Care: A Guide for Shelters www.avianwelfare.org.
3. Born FreeUSA(2003–2011)Current Law and Suggested Approaches to Improving Captive Bird Welfare http://www.bornfreeusa.org/b4a2birdwelfare.php.