APA (7th ed.) Citation

Geological Survey (U.S.). (1989). Index to 1: 25,000-scale United States-Mexico border color image maps, 1989. Interior-Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Index to 1: 25,000-scale United States-Mexico Border Color Image Maps, 1989. Reston, Va.: Interior-Geological Survey, 1989.

MLA (9th ed.) Citation

Geological Survey (U.S.). Index to 1: 25,000-scale United States-Mexico Border Color Image Maps, 1989. Interior-Geological Survey, 1989.