APA (7th ed.) Citation

United States. National Bureau of Standards. (1942). Photoelectric tristimulus colorimetry with 3 filters. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. National Bureau of Standards. Photoelectric Tristimulus Colorimetry with 3 Filters. [Washington]: [publisher not identified], 1942.

MLA (9th ed.) Citation

United States. National Bureau of Standards. Photoelectric Tristimulus Colorimetry with 3 Filters. [publisher not identified], 1942.

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