Philippines (Commonwealth). Bureau of Public Works. (1940). Official copy of the traffic rules and regulations on national roads of the Philippines. [s.n.
Chicago-referens (17:e uppl.)Philippines (Commonwealth). Bureau of Public Works. Official Copy of the Traffic Rules and Regulations on National Roads of the Philippines. Manila: [s.n, 1940.
MLA-referens (9:e uppl.)Philippines (Commonwealth). Bureau of Public Works. Official Copy of the Traffic Rules and Regulations on National Roads of the Philippines. [s.n, 1940.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.