Cita APA

United States. National Park Service. Preservation Assistance Division. (1989). Preservation tech notes. National Park Service, Preservation Assistance Division.

Citación estilo Chicago

United States. National Park Service. Preservation Assistance Division. Preservation Tech Notes. Washington, D.C.: National Park Service, Preservation Assistance Division, 1989.

Cita MLA

United States. National Park Service. Preservation Assistance Division. Preservation Tech Notes. National Park Service, Preservation Assistance Division, 1989.

Warning: These citations may not always be 100% accurate.