United States. Department of Agriculture. Library. (1943). Summary of literature on milkweeds (Asclepias spp.) and their utilization. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Department of Agriculture. Library. Summary of Literature on Milkweeds (Asclepias Spp.) and Their Utilization. [Washington]: [s.n.], 1943.
MLA (9th ed.) CitationUnited States. Department of Agriculture. Library. Summary of Literature on Milkweeds (Asclepias Spp.) and Their Utilization. [s.n.], 1943.
Warning: These citations may not always be 100% accurate.