United States. Bureau of Public Roads. (1926). General instructions to resident engineers and superintendents of construction on national forest roads and national parks roads. U.S. GPO.
Chicago Style (17th ed.) CitationUnited States. Bureau of Public Roads. General Instructions to Resident Engineers and Superintendents of Construction on National Forest Roads and National Parks Roads. Washington: U.S. GPO, 1926.
MLA (9th ed.) CitationUnited States. Bureau of Public Roads. General Instructions to Resident Engineers and Superintendents of Construction on National Forest Roads and National Parks Roads. U.S. GPO, 1926.
Warning: These citations may not always be 100% accurate.