APA (7th ed.) Citation

Geological Survey (U.S.), Knebel, H. J., & Scanlon, K. M. (1985). Maps showing sea-floor topography, depth to bedrock, and sediment thickness, Penobscot Bay, Maine. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), Harley J. Knebel, and Kathryn M. Scanlon. Maps Showing Sea-floor Topography, Depth to Bedrock, and Sediment Thickness, Penobscot Bay, Maine. Reston, Va.: The Survey, 1985.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Maps Showing Sea-floor Topography, Depth to Bedrock, and Sediment Thickness, Penobscot Bay, Maine. The Survey, 1985.