Alabama. Dept. of Agriculture and Industries. Division of Plant Industry. (1943). Certification of seed sweet potatoes and sweet potato plants (Rev.). The Division.
Chicago-referens (17:e uppl.)Alabama. Dept. of Agriculture and Industries. Division of Plant Industry. Certification of Seed Sweet Potatoes and Sweet Potato Plants. Rev. Montgomery, Ala.: The Division, 1943.
MLA-referens (8:e uppl.)Alabama. Dept. of Agriculture and Industries. Division of Plant Industry. Certification of Seed Sweet Potatoes and Sweet Potato Plants. Rev. The Division, 1943.
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