APA (7th ed.) Citation

Pinnell, C. (1961). Driver requirements in freeway entrance ramp design. Texas Transportation Institute.

Chicago Style (17th ed.) Citation

Pinnell, Charles. Driver Requirements in Freeway Entrance Ramp Design. College Station, Tex.: Texas Transportation Institute, 1961.

MLA (9th ed.) Citation

Pinnell, Charles. Driver Requirements in Freeway Entrance Ramp Design. Texas Transportation Institute, 1961.