APA-referens (7:e uppl.)

Willard, E. (1845). Universal history in perspective (2d ed.). A.S. Barnes & Co..

Chicago-referens (17:e uppl.)

Willard, Emma. Universal History in Perspective. 2d ed. Philadelphia: A.S. Barnes & Co., 1845.

MLA-referens (8:e uppl.)

Willard, Emma. Universal History in Perspective. 2d ed. A.S. Barnes & Co., 1845.