APA

British Standard 873:1973:2, . (1973). Construction of road traffic signs and internally illuminated bollards. Specificaation. Part 2. miscellaneous signs. London: British Standard 873:1973:2.

Chicago

British Standard 873:1973:2, . 1973. Construction of road traffic signs and internally illuminated bollards. Specificaation. Part 2. miscellaneous signs. London: British Standard 873:1973:2.

Harvard

British Standard 873:1973:2, . (1973). Construction of road traffic signs and internally illuminated bollards. Specificaation. Part 2. miscellaneous signs. London: British Standard 873:1973:2.

MLA

British Standard 873:1973:2, . Construction of road traffic signs and internally illuminated bollards. Specificaation. Part 2. miscellaneous signs. London: British Standard 873:1973:2. 1973.