APA (7th ed.) Citation

Geological Survey. (1968). Guam, 1: 24,000. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey. Guam, 1: 24,000. Washington: Geological Survey, 1968.

MLA (8th ed.) Citation

Geological Survey. Guam, 1: 24,000. Geological Survey, 1968.

Warning: These citations may not always be 100% accurate.