APA (7th ed.) Citation

Department of Public Highways. (1975). Philippine international road signs manual. Department of Public Highways.

Chicago Style (17th ed.) Citation

Department of Public Highways. Philippine International Road Signs Manual. Manila: Department of Public Highways, 1975.

MLA (9th ed.) Citation

Department of Public Highways. Philippine International Road Signs Manual. Department of Public Highways, 1975.

Warning: These citations may not always be 100% accurate.