APA (7th ed.) Citation

Geological Survey & Bromery, R. W. (1967). Simple bouguer gravity map of Massachusetts. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey and Randolph W. Bromery. Simple Bouguer Gravity Map of Massachusetts. Washington, D.C.: The Survey, 1967.

MLA (8th ed.) Citation

Geological Survey and Randolph W. Bromery. Simple Bouguer Gravity Map of Massachusetts. The Survey, 1967.