APA

Rowan N. J., Johnson J. H., United States & Texas Transportation Institute. (1980). Safety design and operational practices for streets and highways. Washington, D.C: U.S. Dept. of Transportation, Offices of Research and Development, Implementation Division.

Chicago

Rowan Neilon J, Johnson Jocille Hanover, United States and Texas Transportation Institute. 1980. Safety design and operational practices for streets and highways. Washington, D.C: U.S. Dept. of Transportation, Offices of Research and Development, Implementation Division.

Harvard

Rowan N. J., Johnson J. H., United States and Texas Transportation Institute. (1980). Safety design and operational practices for streets and highways. Washington, D.C: U.S. Dept. of Transportation, Offices of Research and Development, Implementation Division.

MLA

Rowan Neilon J, Johnson Jocille Hanover, United States and Texas Transportation Institute. Safety design and operational practices for streets and highways. Washington, D.C: U.S. Dept. of Transportation, Offices of Research and Development, Implementation Division. 1980.