Cita APA (7a ed.)

Kell, J. H., & Johnson, B. C. (1970). Optimizing street operations through traffic regulations and control. Highway Research Board, National Research Council.

Cita Chicago Style (17a ed.)

Kell, James H., y Barnard C. Johnson. Optimizing Street Operations Through Traffic Regulations and Control. [Washington]: Highway Research Board, National Research Council, 1970.

Cita MLA (9a ed.)

Kell, James H., y Barnard C. Johnson. Optimizing Street Operations Through Traffic Regulations and Control. Highway Research Board, National Research Council, 1970.