APA (7th ed.) Citation

Gray, W. F. (1940). Lighting conditions in a number of Texas public schools. [publisher not identified].

Chicago Style (17th ed.) Citation

Gray, Willard Franklin. Lighting Conditions in a Number of Texas Public Schools. (College Station, Texas): [publisher not identified], 1940.

MLA (9th ed.) Citation

Gray, Willard Franklin. Lighting Conditions in a Number of Texas Public Schools. [publisher not identified], 1940.