APA-referens (7:e uppl.)

Beullens, P. Like a book written by god's finger: Animals showing the path toward god / Pieter Beullens. A cultural history of animals in the Medieval age.(2007).

Chicago-referens (17:e uppl.)

Beullens, Pieter. "Like a Book Written by God's Finger: Animals Showing the Path Toward God / Pieter Beullens." A Cultural History of Animals in the Medieval Age.(2007) .

MLA-referens (8:e uppl.)

Beullens, Pieter. "Like a Book Written by God's Finger: Animals Showing the Path Toward God / Pieter Beullens." A Cultural History of Animals in the Medieval Age.(2007), .