APA (7th ed.) Citation

United States. National Park Service. Preservation Assistance Division. Preservation tech notes: Masonry. National Park Service, Preservation Assistance Division.

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

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