United States. Department of Agriculture. Office of the Secretary, Clawson, A. B., & Marsh, C. D. (1923). Woolly-pod milkweed: Dangerous stock-poisoning plant. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Department of Agriculture. Office of the Secretary, A. B. Clawson, and C. Dwight Marsh. Woolly-pod Milkweed: Dangerous Stock-poisoning Plant. Washington: [publisher not identified], 1923.
MLA (9th ed.) CitationUnited States. Department of Agriculture. Office of the Secretary, et al. Woolly-pod Milkweed: Dangerous Stock-poisoning Plant. [publisher not identified], 1923.
Warning: These citations may not always be 100% accurate.