Não informado. (2007). Report of the Division of the Agriculture. Iowa State College, Division of the Agriculture.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Report of the Division of the Agriculture. Ames, Iowa: Iowa State College, Division of the Agriculture, 2007.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Report of the Division of the Agriculture. Iowa State College, Division of the Agriculture, 2007.
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