United States. Department of Agriculture. Office of the Secretary & Whiteman, T. M. (1932). Commercial forcing of lilies-of-the-valley. U.S. GPO.
Chicago Style (17th ed.) CitationUnited States. Department of Agriculture. Office of the Secretary and T. M. Whiteman. Commercial Forcing of Lilies-of-the-valley. Washington: U.S. GPO, 1932.
MLA (9th ed.) CitationUnited States. Department of Agriculture. Office of the Secretary and T. M. Whiteman. Commercial Forcing of Lilies-of-the-valley. U.S. GPO, 1932.
Warning: These citations may not always be 100% accurate.