APA

Cushing E., Barker R., . (1974). Summary of geologic and hydrologic information pertinent to tunneling in selected urban areas. Reston, VA: U.S. Department of the Interior. Geological Survey.

Chicago

Cushing EM, Barker RM, . 1974. Summary of geologic and hydrologic information pertinent to tunneling in selected urban areas. Reston, VA: U.S. Department of the Interior. Geological Survey.

Harvard

Cushing E., Barker R., . (1974). Summary of geologic and hydrologic information pertinent to tunneling in selected urban areas. Reston, VA: U.S. Department of the Interior. Geological Survey.

MLA

Cushing EM, Barker RM, . Summary of geologic and hydrologic information pertinent to tunneling in selected urban areas. Reston, VA: U.S. Department of the Interior. Geological Survey. 1974.