APA (7th ed.) Citation

Elmberg, C. M., & Michael, H. L. (1961). The effect on speed of speed limit signs on suburban arterial streets. Purdue University.

Chicago Style (17th ed.) Citation

Elmberg, Curt M., and Harold L. Michael. The Effect on Speed of Speed Limit Signs on Suburban Arterial Streets. Lafayette: Purdue University, 1961.

MLA (9th ed.) Citation

Elmberg, Curt M., and Harold L. Michael. The Effect on Speed of Speed Limit Signs on Suburban Arterial Streets. Purdue University, 1961.