Cita APA

Estados Unidos. Geological Survey, & Estados Unidos. Geological Survey. (1974). Geological map and section of the Betterton quadrangle, Kent County, Maryland. Reston, Va.: The Survey.

Citación estilo Chicago

Estados Unidos. Geological Survey, y Estados Unidos. Geological Survey. Geological Map and Section of the Betterton Quadrangle, Kent County, Maryland. Reston, Va.: The Survey, 1974.

Cita MLA

Estados Unidos. Geological Survey, y Estados Unidos. Geological Survey. Geological Map and Section of the Betterton Quadrangle, Kent County, Maryland. Reston, Va.: The Survey, 1974.