APA (7th ed.) Citation

Gale Group. (2016). Worldmark encyclopedia of the states (Eighth edition.). Gale, Cengage Learning.

Chicago Style (17th ed.) Citation

Gale Group. Worldmark Encyclopedia of the States. Eighth edition. Farmington Hills, Michigan: Gale, Cengage Learning, 2016.

MLA (9th ed.) Citation

Gale Group. Worldmark Encyclopedia of the States. Eighth edition. Gale, Cengage Learning, 2016.