Rujukan Appenzeller (ayam)

  • Ekarius, Carol (2007). Storey's Illustrated Guide to Poultry Breeds. 210 MAS MoCA Way, North Adams MA 01247: Storey Publishing. ISBN 978-1-58017-667-5.CS1 maint: location (link)
  • Graham, Chris (2006). Choosing and Keeping Chickens. 2-4 Heron Quays London E14 4JP: Octopus Publishing. ISBN 978-0-7938-0601-0.CS1 maint: location (link)