APA (7th ed.) Citation

Welsh, K. W., Rasmussen, P. G., & Vaughan, J. A. (1977). Readability of alphanumeric characters having various contrast levels as a function of age and illumination mode. Dept. of Transportation, Federal Aviation Administration, Office of Aviation Medicine.

Chicago Style (17th ed.) Citation

Welsh, Kenneth W., P. G. Rasmussen, and John A. Vaughan. Readability of Alphanumeric Characters Having Various Contrast Levels as a Function of Age and Illumination Mode. Washington: Dept. of Transportation, Federal Aviation Administration, Office of Aviation Medicine, 1977.

MLA (9th ed.) Citation

Welsh, Kenneth W., et al. Readability of Alphanumeric Characters Having Various Contrast Levels as a Function of Age and Illumination Mode. Dept. of Transportation, Federal Aviation Administration, Office of Aviation Medicine, 1977.