Philippines (Republic). Bureau of Public Works & Highway Planning Survey. (1950). Philippine highways: A study of the highway transport system requirements and recommendations. s.n.].
Citazione stile Chigago Style (17a edizione)Philippines (Republic). Bureau of Public Works e Highway Planning Survey. Philippine Highways: A Study of the Highway Transport System Requirements and Recommendations. [Manila: s.n.], 1950.
Citatione MLA (9a ed.)Philippines (Republic). Bureau of Public Works e Highway Planning Survey. Philippine Highways: A Study of the Highway Transport System Requirements and Recommendations. s.n.], 1950.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.