Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (8ú heag.)

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

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