United States. Department of Health, Education, and Welfare. (1924). Studies in illumination: I. Hygienic conditions of illumination in certain post offices, especially relating to visual defects and efficiency. GPO.
Chicago Style (17th ed.) CitationUnited States. Department of Health, Education, and Welfare. Studies in Illumination: I. Hygienic Conditions of Illumination in Certain Post Offices, Especially Relating to Visual Defects and Efficiency. [Washington]: GPO, 1924.
MLA (9th ed.) CitationUnited States. Department of Health, Education, and Welfare. Studies in Illumination: I. Hygienic Conditions of Illumination in Certain Post Offices, Especially Relating to Visual Defects and Efficiency. GPO, 1924.
Warning: These citations may not always be 100% accurate.