APA-referens (7:e uppl.)

Hancocks, D. Zoo animals as entertainment exhibitions: David Hancocks. A cultural history of animals in the modern age.(2007).

Chicago-referens (17:e uppl.)

Hancocks, David. "Zoo Animals as Entertainment Exhibitions: David Hancocks." A Cultural History of Animals in the Modern Age.(2007) .

MLA-referens (8:e uppl.)

Hancocks, David. "Zoo Animals as Entertainment Exhibitions: David Hancocks." A Cultural History of Animals in the Modern Age.(2007), .