APA (7e ed.) Bronvermelding

(1977). Readability of alphanumeric characters having various contrast levels as a function of age and illumination mode / Kenneth W. Welsh Paul G. Rasmussen, and John A. Vaughan ; Civil Aeromedical Institute, Federal Aviation Administration, Oklahoma City, Oklahoma.

Chicago (17e ed.) Bronvermelding

Readability of Alphanumeric Characters Having Various Contrast Levels as a Function of Age and Illumination Mode / Kenneth W. Welsh Paul G. Rasmussen, and John A. Vaughan ; Civil Aeromedical Institute, Federal Aviation Administration, Oklahoma City, Oklahoma. 1977.

MLA (9e ed.) Bronvermelding

Readability of Alphanumeric Characters Having Various Contrast Levels as a Function of Age and Illumination Mode / Kenneth W. Welsh Paul G. Rasmussen, and John A. Vaughan ; Civil Aeromedical Institute, Federal Aviation Administration, Oklahoma City, Oklahoma. 1977.