APA

Parsonson P., Tarnoff P., . (1979). Maintenance costs of traffic signals. : Transportation research record.

Chicago

Parsonson PS, Tarnoff PJ, . 1979. Maintenance costs of traffic signals. : Transportation research record.

Harvard

Parsonson P., Tarnoff P., . (1979). Maintenance costs of traffic signals. : Transportation research record.

MLA

Parsonson PS, Tarnoff PJ, . Maintenance costs of traffic signals. : Transportation research record. 1979.