APA

Southworth S., . (2008). Geology of the Chesapeake and Ohio Canal National Historical Park and Potomac River corridor, District of Columbia, Maryland, West Virginia, and Virginia. Reston, Va: U.S. Dep. of the Interior, U.S. Geological Survey.

Chicago

Southworth Scott, . 2008. Geology of the Chesapeake and Ohio Canal National Historical Park and Potomac River corridor, District of Columbia, Maryland, West Virginia, and Virginia. Reston, Va: U.S. Dep. of the Interior, U.S. Geological Survey.

Harvard

Southworth S., . (2008). Geology of the Chesapeake and Ohio Canal National Historical Park and Potomac River corridor, District of Columbia, Maryland, West Virginia, and Virginia. Reston, Va: U.S. Dep. of the Interior, U.S. Geological Survey.

MLA

Southworth Scott, . Geology of the Chesapeake and Ohio Canal National Historical Park and Potomac River corridor, District of Columbia, Maryland, West Virginia, and Virginia. Reston, Va: U.S. Dep. of the Interior, U.S. Geological Survey. 2008.