APA (7th ed.) Citation

Geological Survey (U.S.) & United States. National Ocean Service. (1993). Port Townsend, Washington: 1:100 000-scale metric topographic--bathymetric map : 30 x 60 minute series (topographic--bathymetric). The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and United States. National Ocean Service. Port Townsend, Washington: 1:100 000-scale Metric Topographic--bathymetric Map : 30 X 60 Minute Series (topographic--bathymetric). Reston, Va.: The Survey, 1993.

MLA (9th ed.) Citation

Geological Survey (U.S.) and United States. National Ocean Service. Port Townsend, Washington: 1:100 000-scale Metric Topographic--bathymetric Map : 30 X 60 Minute Series (topographic--bathymetric). The Survey, 1993.