APA (7th ed.) Citation

United States. National Bureau of Standards. (1941). Asphalt-prepared roll roofings and shingles. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. National Bureau of Standards. Asphalt-prepared Roll Roofings and Shingles. [Washington]: [publisher not identified], 1941.

MLA (9th ed.) Citation

United States. National Bureau of Standards. Asphalt-prepared Roll Roofings and Shingles. [publisher not identified], 1941.

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