Planning Research Corporation, Gerlough, D. L., & Wagner, F. A. (1967). Improved criteria for traffic signals at individual intersections. Highway Research Board.
Chicago Style (17th ed.) CitationPlanning Research Corporation, Daniel L. Gerlough, and Frederick A. Wagner. Improved Criteria for Traffic Signals at Individual Intersections. [Washington]: Highway Research Board, 1967.
MLA (9th ed.) CitationPlanning Research Corporation, et al. Improved Criteria for Traffic Signals at Individual Intersections. Highway Research Board, 1967.
Warning: These citations may not always be 100% accurate.