APA

Illinois. Div. of Highways. R&D report nr 21, . (1969). Experimental use of urethane foam insulation to control bridge deck icing. uo, IL: Illinois. Div. of Highways. R&D report nr 21.

Chicago

Illinois. Div. of Highways. R&D report nr 21, . 1969. Experimental use of urethane foam insulation to control bridge deck icing. uo, IL: Illinois. Div. of Highways. R&D report nr 21.

Harvard

Illinois. Div. of Highways. R&D report nr 21, . (1969). Experimental use of urethane foam insulation to control bridge deck icing. uo, IL: Illinois. Div. of Highways. R&D report nr 21.

MLA

Illinois. Div. of Highways. R&D report nr 21, . Experimental use of urethane foam insulation to control bridge deck icing. uo, IL: Illinois. Div. of Highways. R&D report nr 21. 1969.