Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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