APA

Richardson W., . (1976). Comparison of legibility potential of reflective sign components. Executive summary. Columbus, OH: Ohio Department of Transportation. Bureau of Traffic.

Chicago

Richardson WC, . 1976. Comparison of legibility potential of reflective sign components. Executive summary. Columbus, OH: Ohio Department of Transportation. Bureau of Traffic.

Harvard

Richardson W., . (1976). Comparison of legibility potential of reflective sign components. Executive summary. Columbus, OH: Ohio Department of Transportation. Bureau of Traffic.

MLA

Richardson WC, . Comparison of legibility potential of reflective sign components. Executive summary. Columbus, OH: Ohio Department of Transportation. Bureau of Traffic. 1976.