United States. Department of Agriculture. Office of the Secretary & Park, J. W. (1931). Marketing commercial crop of early potatoes. U.S. GPO.
Chicago Style (17th ed.) CitationUnited States. Department of Agriculture. Office of the Secretary and J. W. Park. Marketing Commercial Crop of Early Potatoes. Washington: U.S. GPO, 1931.
MLA (9th ed.) CitationUnited States. Department of Agriculture. Office of the Secretary and J. W. Park. Marketing Commercial Crop of Early Potatoes. U.S. GPO, 1931.
Warning: These citations may not always be 100% accurate.