APA (7th ed.) Citation

United States. Bureau of Standards. (1920). Examination of Munsell color system: 1. Spectral and total reflection and Munsell scale of value. GPO.

Chicago Style (17th ed.) Citation

United States. Bureau of Standards. Examination of Munsell Color System: 1. Spectral and Total Reflection and Munsell Scale of Value. [Washington]: GPO, 1920.

MLA (9th ed.) Citation

United States. Bureau of Standards. Examination of Munsell Color System: 1. Spectral and Total Reflection and Munsell Scale of Value. GPO, 1920.

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