Cita APA (7th ed.)

Kell, J. H., & Fullerton, I. J. (1991). Manual of traffic signal design (2nd ed.). Prentice Hall.

Cita Chicago (17th ed.)

Kell, James H., i Iris J. Fullerton. Manual of Traffic Signal Design. 2nd ed. Englewood Cliffs, N.J: Prentice Hall, 1991.

Cita MLA (9th ed.)

Kell, James H., i Iris J. Fullerton. Manual of Traffic Signal Design. 2nd ed. Prentice Hall, 1991.