United States. Department of Agriculture. Office of the Secretary. (1914). Insect damage to cones and seeds of Pacific Coast conifers. U.S. GPO.
Chicago Style (17th ed.) CitationUnited States. Department of Agriculture. Office of the Secretary. Insect Damage to Cones and Seeds of Pacific Coast Conifers. Washington: U.S. GPO, 1914.
MLA (9th ed.) CitationUnited States. Department of Agriculture. Office of the Secretary. Insect Damage to Cones and Seeds of Pacific Coast Conifers. U.S. GPO, 1914.
Warning: These citations may not always be 100% accurate.