WILLS, Simon. A history of birds. Barnsley : Pen & Sword White Owl, 2017. 1 online zdroj (vii, 180 stran). Dostupné na internetu: <http://search.ebscohost.com/login.aspx?direct=true&db=nlebk&AN=1620373&lang=cs&site=eds-live&ebv=EB&ppid=pp_Cover> ISBN 978-1-52670-156-5.