Cita APA

Witheford, D. K., & Witheford, D. K. (1970). Speed enforcement policies and practice. Saugatuck, Conn.: Eno Foundation for Transportation.

Citación estilo Chicago

Witheford, David K., y David K. Witheford. Speed Enforcement Policies and Practice. Saugatuck, Conn.: Eno Foundation for Transportation, 1970.

Cita MLA

Witheford, David K., y David K. Witheford. Speed Enforcement Policies and Practice. Saugatuck, Conn.: Eno Foundation for Transportation, 1970.