APA

British Standard. BS PD 6518:1987, . (1987). Prefabricated temporary road marking materials for use at road works. London: British Standard. BS PD 6518:1987.

Chicago

British Standard. BS PD 6518:1987, . 1987. Prefabricated temporary road marking materials for use at road works. London: British Standard. BS PD 6518:1987.

Harvard

British Standard. BS PD 6518:1987, . (1987). Prefabricated temporary road marking materials for use at road works. London: British Standard. BS PD 6518:1987.

MLA

British Standard. BS PD 6518:1987, . Prefabricated temporary road marking materials for use at road works. London: British Standard. BS PD 6518:1987. 1987.