Cita APA (7th ed.)

Grolier Incorporated. (2003). The Encyclopedia Americana. Grolier Inc.

Cita Chicago (17th ed.)

Grolier Incorporated. The Encyclopedia Americana. Danbury, Conn: Grolier Inc, 2003.

Cita MLA (9th ed.)

Grolier Incorporated. The Encyclopedia Americana. Grolier Inc, 2003.