- ^ "Siberian Tiger". Wikipedia. Retrieved 12 March 2015.
- ^ Harcourt, Sandy (1991). "Endangered species". Nature. 354.
{{cite journal}}
:|access-date=
requires|url=
(help) - ^ Lonqbrake, Pamela (2002). "Endangered Animals". The book report. 21.
{{cite journal}}
:|access-date=
requires|url=
(help)