Darwin, C. (1897). The expression of the emotions in man and animals: With photographic and other illus ([Authorized ed.].). D. Appleton and company.
Chicago-referens (17:e uppl.)Darwin, Charles. The Expression of the Emotions in Man and Animals: With Photographic and Other Illus. [Authorized ed.]. New York: D. Appleton and company, 1897.
MLA-referens (8:e uppl.)Darwin, Charles. The Expression of the Emotions in Man and Animals: With Photographic and Other Illus. [Authorized ed.]. D. Appleton and company, 1897.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.