APA (7th ed.) Citation

Gale Group. (2008). Gale encyclopedia of world history: Governments. Gale.

Chicago Style (17th ed.) Citation

Gale Group. Gale Encyclopedia of World History: Governments. Detroit, Mich: Gale, 2008.

MLA (9th ed.) Citation

Gale Group. Gale Encyclopedia of World History: Governments. Gale, 2008.