APA (7th ed.) Citation

(1998). Levels of investigation. U.S. Department of the Interior, National Park Service, Cultural Resources, Park Historic Structures & Cultural Landscapes.

Chicago Style (17th ed.) Citation

Levels of Investigation. [Washington, D.C.]: U.S. Department of the Interior, National Park Service, Cultural Resources, Park Historic Structures & Cultural Landscapes, 1998.

MLA (9th ed.) Citation

Levels of Investigation. U.S. Department of the Interior, National Park Service, Cultural Resources, Park Historic Structures & Cultural Landscapes, 1998.