British Standards Institution. (1973). Specification for the construction of road traffic signs and internally illuminated bollards (2nd revision.). British Standards Institution.
芝加哥风格引文British Standards Institution. Specification for the Construction of Road Traffic Signs and Internally Illuminated Bollards. 2nd revision. London: British Standards Institution, 1973.
MLA引文British Standards Institution. Specification for the Construction of Road Traffic Signs and Internally Illuminated Bollards. 2nd revision. British Standards Institution, 1973.
警告：这些引文格式不一定是100％准确.