APA

Highway User Quarterly, . (1973). A traffic signal for the blind. : Highway User Quarterly.

Chicago

Highway User Quarterly, . 1973. A traffic signal for the blind. : Highway User Quarterly.

Harvard

Highway User Quarterly, . (1973). A traffic signal for the blind. : Highway User Quarterly.

MLA

Highway User Quarterly, . A traffic signal for the blind. : Highway User Quarterly. 1973.