Cita APA

Sanders, J. H., McGee, W., & Yoo, C. S. (1979). Safety features of stop signs at rail-highway grade crossings. Springfield Va.: National Technical Information Service.

Citación estilo Chicago

Sanders, James H., W. McGee, y Chang S. Yoo. Safety Features of Stop Signs At Rail-highway Grade Crossings. Springfield Va.: National Technical Information Service, 1979.

Cita MLA

Sanders, James H., W. McGee, y Chang S. Yoo. Safety Features of Stop Signs At Rail-highway Grade Crossings. Springfield Va.: National Technical Information Service, 1979.