APA (7th ed.) Citation

Scifres, P. N., & Loutzenheiser, R. C. (1975). Wrong-way movements on divided highways. Purdue University.

Chicago Style (17th ed.) Citation

Scifres, Peter N., and Roy C. Loutzenheiser. Wrong-way Movements on Divided Highways. West Lafayette, Ind.: Purdue University, 1975.

MLA (9th ed.) Citation

Scifres, Peter N., and Roy C. Loutzenheiser. Wrong-way Movements on Divided Highways. Purdue University, 1975.