United States. Federal Highway Administration\nUnited States. Bureau of Public Roads\nUnited States. Federal Highway Administration. Offices of Research, Development, and Technology\nUnited States. Federal Highway Administration. Office of Research and Development. (1918). Public Roads: A journal of highway research. U.S. Federal Highway Administration.
Παραπομπή σε μορφή Chicago (17η εκδ.)United States. Federal Highway Administration\nUnited States. Bureau of Public Roads\nUnited States. Federal Highway Administration. Offices of Research, Development, and Technology\nUnited States. Federal Highway Administration. Office of Research and Development. Public Roads: A Journal of Highway Research. Washington: U.S. Federal Highway Administration, 1918.
Παραπομπή σε μορφή MLA (8th εκδ.)United States. Federal Highway Administration\nUnited States. Bureau of Public Roads\nUnited States. Federal Highway Administration. Offices of Research, Development, and Technology\nUnited States. Federal Highway Administration. Office of Research and Development. Public Roads: A Journal of Highway Research. U.S. Federal Highway Administration, 1918.