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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)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.