Παραπομπή APA

(1973). Specification for the construction of road traffic signs and internally illuminated bollards. London: British Standards Institution.

Παραπομπή Chicago Style

Specification for the Construction of Road Traffic Signs and Internally Illuminated Bollards. London: British Standards Institution, 1973.

Παραπομπή MLA

Specification for the Construction of Road Traffic Signs and Internally Illuminated Bollards. London: British Standards Institution, 1973.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.