Autor de: Cão senso... 2012 (orelha: biólogo. Fundador e diretor do Anthrozoology Institute)

http://authorities.loc.gov (d.n.)

http://catalog.loc.gov 3/10/2013 (d.n.)

http://id.ndl.go.jp/auth/ndlna/001114977 (d.n.)

http://www.regansdogtraining.co.uk/articles/john-bradshaw