Não informado. (1891). Bulletin of the North Dakota Agricultural Experiment Station. North Dakota Agricultural Experiment Station.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Bulletin of the North Dakota Agricultural Experiment Station. Fargo, ND: North Dakota Agricultural Experiment Station, 1891.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Bulletin of the North Dakota Agricultural Experiment Station. North Dakota Agricultural Experiment Station, 1891.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.