Cita APA (7th ed.)

Chatfield, B. V., & Council, F. M. (1987). System-wide safety improvements: An approach to safety consistency. Transportation Research Board, National Research Council.

Cita Chicago (17th ed.)

Chatfield, Benjamin V., i Forrest M. Council. System-wide Safety Improvements: An Approach to Safety Consistency. Washington, D.C: Transportation Research Board, National Research Council, 1987.

Cita MLA (9th ed.)

Chatfield, Benjamin V., i Forrest M. Council. System-wide Safety Improvements: An Approach to Safety Consistency. Transportation Research Board, National Research Council, 1987.