APA (7th ed.) Citation

Key Maps, Inc. (2001). Cima Inc. -zone map: [east Harris County]. Key Maps.

Chicago Style (17th ed.) Citation

Key Maps, Inc. Cima Inc. -zone Map: [east Harris County]. [Houston, Tex.]: Key Maps, 2001.

MLA (9th ed.) Citation

Key Maps, Inc. Cima Inc. -zone Map: [east Harris County]. Key Maps, 2001.