APA

Hahn K., . (1976). Effects of sign illumination on driver performance. Albany, NY: New York State Department of Transportation. Engineering Research and Development Bureau. Special report nr 44.

Chicago

Hahn KC, . 1976. Effects of sign illumination on driver performance. Albany, NY: New York State Department of Transportation. Engineering Research and Development Bureau. Special report nr 44.

Harvard

Hahn K., . (1976). Effects of sign illumination on driver performance. Albany, NY: New York State Department of Transportation. Engineering Research and Development Bureau. Special report nr 44.

MLA

Hahn KC, . Effects of sign illumination on driver performance. Albany, NY: New York State Department of Transportation. Engineering Research and Development Bureau. Special report nr 44. 1976.